Chapter 1: The Heart Governs the Spirit

“The heart governs the spirit” is a sentence everyone in the Chinese tradition has heard, and one that is easy to say too lightly. It is familiar because ordinary speech is full of it: to think with the heart, to have a quiet grasp of things in the heart, to be unsettled in heart and spirit (xinshen bu ning). It is easy to thin out because a modern ear, at the word “heart,” goes straight to the organ beating in the chest, and hears shenming (神明)—the spirit as the luminous order of a life, covering both vital activity and mental life—as antique mysticism. In Chinese medicine and in pre-Qin thought, the heart was never only a piece of muscle. Shenming was never a doctrine about ghosts. Shen (神), the spirit, is the clarity and animation by which a person is recognizably alive and aware. Together they name the whole of vital activity and the whole of mental life.

This chapter has a concrete job: to take that sentence down from a slogan and set it back up as a framework one can understand, set beside daily life, and bring into conversation with modern medicine. We begin by separating the heart of flesh and blood from the heart of spirit, then unfold the claim in five aspects. We then see how heart-spirit commands the spirits lodged in the five viscera, presides over hun (魂)—the mobile side of spirit, tied to dreams, imagination, and wandering attention—and po (魄)—the embodied side, tied to sensation, movement, and inborn reaction—and also takes in yi (意), intention, the mind’s first hold on things, and zhi (志), will, intention held steady as a direction. After that comes the historical dispute over whether the heart or the brain “governs,” and the contemporary idea of heart–brain coupling. The chapter ends with clinical reasoning, the settling of the spirit by herbs and food, and the maxim that to care for life one must first care for the heart. You need not become a practitioner of Chinese medicine to finish it. You should, though, see more clearly why the ancients housed shen in the heart, and what that housing means today for sleep, emotion, memory, and the way a life is arranged.

1. The Historical Thread: How an Old Sentence Grew into a Theory

“The heart governs the spirit” was not invented out of thin air by the Huangdi Neijing (the Yellow Emperor’s Inner Classic). Long before that collection took shape, the pre-Qin philosophers had already set the heart at the center of how a life is governed. Xunzi’s “Discourse on Heaven” says: “心居中虚，以治五官，夫是之谓天君。” The heart dwells in the empty center and governs the five offices; that is why it is called the natural ruler. The offices here are the senses—ear, eye, mouth, and nose. And zhi, “to govern,” is not an administrative order. It means to preside and to coordinate. Each sense can do its own work, but something at the center has to gather what they report and answer it.

More important, the pre-Qin writers did not treat the heart as a solid organ alone. In ordinary language and in philosophy, “heart” already covered consciousness, thought, feeling, emotion, and what a person takes to be worth doing. When Mencius speaks of exhausting the heart and thereby knowing one’s nature, and when the Guanzi says “心之在体，君之位也”—in the body, the heart holds the ruler’s place—both are saying the same double thing: the heart is a physiological center, and it is the dwelling of mental life. What later Chinese medicine calls the unity of form and spirit, xingshen heyi, is that old intuition turned into medicine. Body and spirit are not two systems that happen to share an address. They are two faces of one life.

The Huangdi Neijing inherited this picture and pushed it further, in three moves. First, it stated the office outright: “心者，君主之官，神明出焉。” The heart holds the office of the monarch, and shenming issues from it. Spirit, in this governing sense, is named as the heart’s output. Second, it proposed that the five viscera store spirit. Mental activity is not a solo performance by the heart. The viscera work together, and the heart leads them. Third, it carried through a holistic view, so that the blood vessels, the color of the face, the emotions, sleep, and knowing all sit on one net. From then on, physicians of every later period thickened the doctrine. Some argued from the blood vessels as what nourishes spirit. Some developed the ways emotion makes disease. Some, in the centuries when Chinese and Western medicine met, reopened the relation of heart and brain. The theory moved. The core stayed relatively stable: spirit takes blood and qi as its basis, the heart as its command, the five viscera as its partners, and the brain and marrow as one of its residences, and it shows itself at last in the condition of a person’s life.

This history is worth keeping in view so that two extremes do not take the field. One extreme treats “the heart governs the spirit” as talk that cannot be checked against anything. The other cuts it away with modern anatomy, and concludes that if spirit is in the brain, the ancients were simply wrong. A fairer reading is this. With the phenomena they could see—complexion, pulse, sleep, emotion, speech—they built a functional model of heart and spirit. Brain imaging and neuroscience can now fill that model in and refine it. They do not oblige us to scrap the model. The later chapters of this book try to say the old sentence clearly again, at the levels of molecule, cell, organ, system, and awareness.

There is another way to read the same history. The ancients had no electrocardiograph and no magnetic resonance scanner, and they still had to answer an urgent question. Why does a person suddenly talk nonsense, lie awake all night, grieve to the point of collapse, or go gray in the face from one day to the next? They gathered these events under the relation of heart and spirit, and out of that gathering they made a language clinicians could use. Once a language exists, it shapes what is noticed. Looking at the spirit, asking about sleep, and feeling the pulse are all ways of testing whether the monarch is settled in place. The theory is a tool tempered by clinical practice across generations. It is worth reading with a toolmaker’s eye: use what explains the phenomena in front of you, and where the explanation runs short, supply modern knowledge. Neither side has to humiliate the other.

2. What “The Heart Governs the Spirit” Means—from the Concrete to the Abstract

(1) What the Heart Is: The Heart of Flesh and the Heart of Spirit

In Chinese medicine, “heart” has at least two layers of meaning. They are related, and they are not the same thing.

The first layer is the heart of flesh and blood: the heart in the anatomical and functional sense. Zhang Jingyue, in the channel section of the Illustrated Supplement to the Classified Classic (Leijing Tuyi), describes it this way: “心象尖圆，形如莲蕊。” The heart is pointed and round, shaped like the bud of a lotus. That is a plain description of the organ’s outline. The Huangdi Neijing also says “心主身之血脉”—the heart governs the blood vessels of the body. Heart, vessels, and blood make up the circulation. The heart is the pump, the vessels are the pipes, and the blood is what the pipes carry. When heart qi is ample, the beat is forceful, and the rhythm is ordered, blood reaches the five viscera and six bowels, the four limbs, and the hundred bones. When heart qi is insufficient, heart yang fails to stir, or stasis blocks the vessels, nourishment falls short. The organs lose their supply, and spirit loses what it depends on.

A household comparison helps. The heart of flesh and blood is like a city’s waterworks. While the pumps run, the lights, the kitchens, and the schools all work. When the pumps fail, one district goes dry first, and if the failure lasts, the whole city dims. The ancients said, in the Suwen (Plain Questions) chapter “On the Eight Regularities and Spirit Brilliance”: “血气者，人之神。” Blood and qi are a person’s spirit. The point is blunt. Without enough blood and qi, and without a clear path for them, what we call spirit has no material support. After a night without sleep the mind will not turn. In anemia or low blood pressure the eyes go dark and the chest flutters with weakness. Those experiences are reminders. Spirit is not something suspended in a vacuum.

The second layer is the heart of spirit: the heart that leads mental life, awareness, emotion, and the coordination of the life as a whole. The Neijing says: “心者，精神之所舍也。” The heart is the lodging of essence and spirit. A lodging is a place to live. Spirit lodges in the heart. When the heart is settled, spirit keeps its post. When the heart is disordered, spirit is disturbed. This “heart” is no longer only a pump. It is the functional center by which a person perceives, judges, remembers, answers emotionally, and holds a self together. Everyday phrases—an uneasy heart, a heart still pounding after the fright has passed, a heart that catches what was meant—are all talking about this layer.

How do the two hearts relate? In short: the heart of flesh and blood is the material basis of the heart of spirit, and the heart of spirit is the outward showing of that basis, together with its higher integration. People with heart disease often have anxiety and insomnia, and the reason is not only that they have been frightened. Long fear or depression can also bring on, or worsen, palpitations, chest tightness, and disturbed rhythm. Form and spirit pull on each other in both directions. When we come to heart–brain coupling, we will see how modern physiology describes that corridor.

One clarification matters. To say that the heart governs the spirit is to leave the brain’s importance intact. It does not ask anyone to insist, as anatomy, that the cells of thought grow inside heart muscle. It is first of all a language of functional grouping and of clinical pattern differentiation. Problems tightly bound up with the mind, the emotions, sleep, the luster of the face, and the nourishment carried by the blood are understood and regulated first from the heart and from the viscera related to it. That language can stand beside the other claim, that the brain is the residence of the original spirit. One of them leans toward command and the whole; the other leans toward a residence and a physical substance. A later section takes this up on its own.

Another comparison from ordinary life: when a company is in trouble, people say to find the person in charge. That does not mean finance, personnel, and engineering are absent. It means that final responsibility and coordination usually land on that person. Chinese medicine names the heart as the person in charge of problems of the mind, so that the clinic can seize the main contradiction. It is not drawing a circuit diagram down to the single neuron. Once a reader can tell a functional metaphor from an anatomical address, there is no reason to enlist on one side of a war between “heart” and “brain.”

(2) What Shenming Is: A Name for Life and Mind

The older sense of shenming sits close to “the subtlety of yin and yang in their changes”—the regularity by which things wax and wane, and dark and light take turns. When the subject is a person, the word gathers into two large domains:

1. The phenomena of vital activity. Breathing, the pulse, warmth, growth, waking and sleep, the luster of the face, the quickness or dullness of a response: whatever shows that this person is alive, and alive with spirit, belongs to spirit in the broad sense. When Chinese medical inspection speaks of “having spirit,” “little spirit,” and “lost spirit,” it looks first at this layer.
2. Mental life in the narrower sense. Perception, attention, memory, thought, will, feeling, and whether speech and action fit the situation. “Spirit-mind,” shenzhi, usually means this layer.

“The heart governs the spirit,” then, is a claim with a definite shape. The heart—together with the vessels it governs and the emotions it holds—holds the leading place in vital activity and in mental life. Leading is not doing every job. All five viscera store spirit, and the brain and marrow also store the mechanism of spirit. Even so, the issuing of orders, and the gathering of what has gone out, are usually discussed from the heart.

In the clinic the broad sense and the narrow sense are read together. An old person with a dull gaze, a slow response, and a gray face will be described as having a failing spirit-qi. A young person whose thinking is sharp, who is anxious all night, and whose speech runs ahead of itself may equally be described as having an unsettled spirit. The first leans toward a shortage in the spirit of life. The second leans toward a spirit of mind that is over-raised, or that has lost its post. Nourishing the heart and settling the spirit aim at these two directions: supply what is short, or quiet what is too stirred, and in either case stop at the recovery of a spirit that is present and at ease.

(3) Five Aspects of “The Heart Governs the Spirit”

Set the abstract claim down where it can be observed, and it comes apart into five aspects. They weave through one another, and each has its own emphasis, so that a reader can set them beside a life.

1. The heart governs the blood vessels, and is the root of life.

When heart qi is ample and the beat is regular, the five viscera and six bowels are moistened and nourished, and vital activity continues. When the beat goes wrong, the lighter end is palpitations, a racing or thumping heart, chest tightness, and shortness of breath. The heavy end is true heart pain and collapse—reversal and desertion—and life itself is in danger. “Root of life,” here, is first a physiological claim. Without an effective circulation, there is no shenming to discuss.

The hints in daily life are not complicated. Long chest tightness, breathlessness after exertion, swelling with no clear cause, sudden shortness of breath at night, or sudden severe chest pain with cold sweat, should not be waved off with advice to take things less to heart. Heart and circulation should be checked first. Before one nourishes spirit, the pumps have to be safe. That is the plainest form of the unity of body and spirit.

In pattern differentiation, damage to this root of life can show as several different patterns: deficiency of heart qi, deficiency of heart yang, deficiency of heart blood, deficiency of heart yin, or stasis blocking the heart vessels. One person fears cold, and the pulse is slow and forceless. Another has heat in the palms, soles, and chest, with insomnia and sweating in sleep. Another has a fixed stabbing pain, and a dark tongue with stasis spots. The names differ. What they share is that the vessels cannot “carry spirit” well. In modern medicine, coronary disease, heart failure, arrhythmia, and cardiomyopathy do not line up one-to-one with any single Chinese medical pattern. All of them, though, insist on the same caution: talk of spirit cannot leave circulation and perfusion behind. Later chapters, on the molecular heart, the cellular heart, and the heart as an organ, will keep spelling out this root of life.

2. The heart’s bloom is in the face, and spirit can be seen.

The Suwen chapter “On the Six Terms and the Phenomena of the Viscera” says: “心者，生之本，神之变也，其华在面，其充在血脉。” The heart is the root of life and the place where spirit changes; its bloom is in the face, and its fullness is in the blood vessels. A person’s radiance and color are usually written on the face first. When heart qi is ample and the vessels are open, the complexion is moist and glowing, the eyes have spirit, and the expression moves. When heart qi is depleted and blood does not glory the face, the complexion is lusterless, sallow, and thin of sheen, and the person is listless. The Suwen chapter “On Needling Methods” puts it as “神失位，使神采不园”: when spirit loses its place, the radiance of the spirit cannot come full.

Complexion is also shaped by the spleen, liver, lung, and kidney, and by outside pathogens, sleep, and mood. One leaf is not the whole tree. As a daily self-observation, though, the face is useful. Several days of a gray, stagnant color, a scattered look in the eyes, and an inability to rouse oneself even for people one is close to often point to qi and blood running short, or to heart-spirit used past its means. Sleep, food, pressure, and mood are the first places to adjust, and a doctor is the next when that is not enough.

“Bloom in the face” also has a social sense. When people meet, the first thing they exchange is often a look and a color. Parents watch whether a child “has spirit.” Partners watch whether the other looks worn. Colleagues watch whether someone is spent. Those ordinary judgments are inspection of the spirit, used without the name. Chinese medicine made the intuition systematic. Complexion is a public notice of qi, blood, and shenming. Makeup can cover a blemish. It cannot cover the “little spirit” left by long insomnia and anxiety.

3. The heart governs knowing and memory.

The Lingshu (the Spiritual Pivot) chapter “On the Five Colors” has “积神于心，以知往今”—gather spirit in the heart, and thereby know what has gone and what is now. The Lingshu chapter “On the Root of Spirit” has “所以任物者谓之心”—that which takes things on, and receives them, is called the heart. Heart-spirit can take in what comes from outside, know it, and join past to present. That is an early statement of attention, perception, and memory. The ancients did not split working memory from long-term memory. They did notice this: when heart-spirit is settled, a person can attend, can remember, and can judge; when heart-spirit is scattered, things are dropped, answers miss the question, and attention behaves like a sieve.

Doing many things at once is praised, among us, as efficiency. The usual price is attention broken into scraps. Chat, mail, and a video meeting can all be open together. On the surface the “heart” is handling a great deal. In fact shenming has been torn into strips. From the standpoint of this chapter, that is a slow spending of a spirit that cannot keep its post. The reader’s check later in the chapter turns the point into a more concrete list of questions.

Damage to knowing and memory is not, in every case, “overuse of the brain.” People short of heart blood often say that a sentence just spoken is gone when they turn their head. People whose clear yang is harassed by phlegm-turbidity often feel as if a fog had been pasted over the mind. People whose vessels are blocked by static blood may have headache in a fixed place, together with forgetfulness. These descriptions are a reminder. In Chinese medicine a memory problem is rarely assigned to one viscus alone, and regulating the heart is often one of the doors in. If forgetfulness advances quickly and begins to disturb orientation and daily life, dementia, stroke, and metabolic disorder have to be ruled out. “Tonifying the heart” must not be used to delay that.

4. The heart holds the emotions.

The Classified Classic (Leijing) says: “凡情志之属为心所统。” Whatever belongs to the emotions is governed by the heart. The Suwen chapter “On the Essentials and Subtleties of the Pulse” describes shenming in disorder: “衣被不敛，言语善恶，不避亲疏。” Clothing left unfastened, speech that does not sort good from ill, no distinction kept between the intimate and the stranger. When emotion runs to excess, heart-spirit is usually the first thing struck. After a burst of rage, the heart races and the breath shortens. After a great grief, sleep fails and appetite goes. After long worry and brooding, the chest is tight and the person sighs. Clinics see this constantly. The five emotions are allotted to the five viscera—anger injures the liver, joy the heart, thought the spleen, worry the lung, fear the kidney—and still a line later physicians have put in many versions remains the working rule: “情志之伤，虽五脏各有所属，然求其所由，则无不从心而发。” Emotional injury, though each of the five viscera has its own share, traces in every case, if one asks where it comes from, back to the heart. The reason is that an emotion has to be felt and gathered by an “I,” and that gathering is the work of heart-spirit.

Emotional disease is a pathological mechanism. It is not a moral charge of “thinking too much.” Long pressure, humiliation swallowed, the loss of someone loved, a major defeat: all of these can reach the heart and the rest of the body through the autonomic nerves, the endocrine system, and changes in behavior—insomnia, drinking, eating in binges, or refusing food. To grant that emotion can injure the heart is to take emotion seriously. It is to refuse the shortcut that makes a disease into a defect of character.

The matching of the five emotions to the five viscera is a frame for understanding, and it should not be clamped on mechanically. The same “anger” injures the liver in one person, who has rib-side pain and a bitter taste, and quickly disturbs the heart in another, who has palpitations and insomnia. The same “thought” injures the spleen in one person, who loses appetite and has loose stool, and also injures the heart in another, who dreams a great deal and forgets. Emotion is a trigger. Where it lands depends on constitution, on how long the illness has run, and on whatever other pathogens are mixed in. The clinic still has to join the four examinations. A reader watching himself or herself does better to watch the chain from emotion to body than to stick on a single label, “anger” or “worry,” and stop there.

5. Temperament is rooted in the heart.

Mencius, in “Exhausting the Heart,” says: “尽其心者，知其性也……君子所性，仁义礼智根于心。” One who fully realizes the heart knows one’s nature. … What the noble person takes as nature—humaneness, rightness, ritual propriety, and wisdom—is rooted in the heart. In the Confucian setting, “heart” opens onto virtue and character. In the medical setting, “heart” opens onto the mind and the temperament. The two are not identical, and they overlap. A tendency of temperament—hasty or quiet, suspicious or open, sensitive or slow—often tracks a lean in heart qi, heart blood, heart yin, or heart yang, and it is just as closely tied to liver qi, gallbladder qi, and the kidney’s storage of will. Patterns such as “heart deficiency with gallbladder timidity” and “heart fire flaming upward” are summaries of mechanism, and they often match changes of temperament one can watch.

Putting this fifth aspect inside “the heart governs the spirit” is a reminder. Caring for the heart is part of treating disease, and it is also a question of how to settle one’s temperament and one’s sense of what matters. To want less for oneself, and to meet circumstances without a constant inner fight, is not an order to give up pursuit. It is a way to spend less force on useless friction, so that heart-spirit has room for what is actually important.

Taken together, the five aspects are a net from the surface inward. The vessels are the base. The face is the surface. Knowing is the use. Emotion is the wave. Temperament is the ground color. A single point out of order is worth noticing. Several points out of order at once deserve to be taken seriously. What follows—on the visceral spirits, on heart and brain, and on the care of life—only weaves this net more tightly.

3. Heart-Spirit Commands the Five Visceral Spirits—Presiding over Hun and Po, Taking in Yi and Zhi

If “the heart governs the spirit” stopped at “the heart matters,” it would still be too coarse. The Neijing sets out a finer spectrum of mental activity and matches it to the five viscera. That spectrum explains why insomnia leads one to ask about the liver, why excessive brooding means one must look after the spleen, why forgetfulness brings the kidney to mind, and why none of this ever quite leaves the heart.

(1) The Ladder of Spirit in the Lingshu, “On the Root of Spirit”

The Lingshu chapter “On the Root of Spirit” (Ben Shen) contains a classic passage:

生之来谓之精，两精相搏谓之神，随神往来者谓之魂，并精出入者谓之魄，所以任物者谓之心，心有所忆谓之意，意之所存谓之志，因志而存变谓之思，因思而远慕谓之虑，因虑而处物谓之智。

Read in English, it runs: What arrives with birth is called essence. The contending of the two essences is called shen. What comes and goes along with shen is called hun. What goes out and comes in together with essence is called po. That which takes things on is called the heart. What the heart holds in mind is called yi. What yi keeps, and where it comes to rest, is called zhi. To turn a matter over because of zhi, and to stay with its changes, is called thinking. To reach far in one’s concern because of thinking is called reflection. To deal with things on the basis of reflection is called wisdom.

It can be read as a ladder from what is given before birth to what is acquired after, and from instinct to wisdom:

• Essence (jing). The original stuff and potential of a life, coming from the essence of the parents and nourished by the essence of grain and water taken in later.
• Shen. The light of a life, born where the two essences contend. It is the general name of mental activity, and its presiding function.
• Hun. Activity of awareness that comes and goes with shen. It leans to yang, to movement, and to wandering: dreams, imagination, sudden insight, and states of haze.
• Po. Instinctive activity that goes out and comes in with essence. It leans to yin, to stillness, and to bodily form: sensation, movement, crying, breathing, and the other responses one is born with.
• Yi. The heart’s attending to a thing, its taking hold, and its first memory. This is where thinking starts.
• Zhi. What yi keeps, and keeps without drifting. The aim is set, and the direction holds.
• Thinking, reflection, and wisdom (si, lü, zhi). Working a goal over, looking far ahead, and at last handling the matter well. These are the higher steps of knowing. The wisdom meant here, 智, is a different word from the will, zhi (志), a step below it.

Conscious life needs essence and qi as its material guarantee, and it shows a development from the elementary to the advanced, from the single to the crowded. An infant has the instinct of po and the wandering of hun first, and only gradually forms yi, zhi, thinking, reflection, and wisdom. An old person whose essence is depleted and whose marrow has thinned may lose memory, will, and interest first. That rough outline does not collide with what developmental psychology, and the study of cognitive decline in age, describe in broad strokes.

(2) The Five Viscera Store Spirit: Divided Work, One Command

The Suwen chapter “Further Discourse on the Five Qi” says: “肝藏魂、心藏神、脾藏意、肺藏魄、肾藏志。” The liver stores hun, the heart stores shen, the spleen stores yi, the lung stores po, and the kidney stores zhi. The Classified Classic presses the question further. Of hun, po, zhi, yi, and the rest of the five spirits and five wills, “孰匪元神所化而统乎一心？” Which of them was not transformed out of the original spirit, and is not governed by the one heart? The five spirits are stored separately in the five viscera, and all of them are generated from, and held by, the original spirit of the heart.

Why must the heart be the beginning and the lead? There are at least two reasons.

First, the heart governs the vessels, and by them nourishes the whole body. The viscera can work in concert only if qi and blood are sufficient and the circulation is open. When heart blood is enough, the liver has blood to store and hun has a lodging; the spleen has qi to move and yi can concentrate; the lung has qi to govern and po can do its work; the kidney has essence to fill and zhi can hold firm. When blood is deficient, blood is static, or heart qi is insufficient, the five spirits are often harmed together. Insomnia with many dreams, poor attention, a tendency to fright and fear, forgetfulness, and fatigue can all be present at once.

Second, disordered emotion often injures the heart first, and once the heart is injured the five viscera are shaken. “Joy injures the heart” is only the example. Anger, worry, thought, and fear, driven to an extreme, all disturb heart-spirit, and then, through the movement of qi, the vessels, sleep, and behavior, feed back into the other organs. The clinic constantly sees “disease because of constraint” woven together with “constraint because of disease.” Emotional injury comes first, and fullness in the chest and rib-side, poor appetite, constipation, or diarrhea follow. Or a long illness comes first, and anxiety and depression follow. If treatment attacks one viscus and ignores heart-spirit, the result is hard to hold.

(3) Hun and the Liver, Sleep and Dreams

Tang Rongchuan wrote: “夜则魂归于肝而为寐。” At night hun returns to the liver, and that return is sleep. Liver-hun and dreaming are tightly tied. The Neijing also has “肝藏血，血舍魂”: the liver stores blood, and blood houses hun. When the liver’s storing of blood is in order, hun has a lodging, and sleep can settle of itself. At night the blood relatively returns and is stored in the liver, and the person can rest. When liver blood is insufficient, when liver constraint turns to fire, or when emotion keeps hun from going home, one sees insomnia, profuse dreaming, nightmares, and in some cases behavior of the sleepwalking kind.

Jingyue’s Complete Works, in the section on blood disorders, discusses the making and the storing of blood: “总统与心，藏受于肝。” Overall command rests with the heart; storage and reception rest with the liver. The heart’s “command” of the vessels and the liver’s “storing” of blood are two links of one chain. In the treatment of insomnia, profuse dreams, and sleepwalking, one therefore often reasons from the liver and, at the same time, nourishes the heart and settles the spirit. The heart has not become unimportant. When hun has left its lodging, the liver must be able to store, and the heart must be able to keep watch. In ordinary life, long nights of staying up, alcohol, emotion held down, and, in women, heavy loss of blood with the menses can all weaken this chain of heart, blood, liver, and hun. The body is lying down. The mind is still in a meeting.

(4) Po and the Lung, Body and Sensation

The Classified Classic says: “魄之为用，能动能作，痛痒由之而觉也。” What po does is to move and to act; pain and itch are felt through it. Movement of the limbs, sensation in the skin, breathing, and crying all relate to po, and they answer to the lung’s functions as well. “肺主气，在体合皮，其华在毛。” The lung governs qi; in the body it pairs with the skin, and its bloom is in the body hair. The Suwen chapter “On the Hidden Canon of the Orchid Chamber” calls the lung “相傅之官，治节出焉”—the official who is prime minister to the monarch, from whom regulation and rhythm issue. When lung-po is disordered, one may see abnormal sensation, disordered breathing, a skin without luster, or, in some illnesses of the mind, a dull response and a slackness in which form and spirit both seem scattered.

Hun is the yang spirit and po the yin spirit, and the two stand as opposites inside a unity under heart-spirit. The Lingshu chapter “On the Natural Span of Life” says that when blood and qi are already in harmony, nutritive and defensive qi already move freely, and the five viscera are already formed, then “神气舍心，魂魄毕具，乃成为人。” Spirit-qi lodges in the heart, hun and po are both complete, and thus one becomes a person. Only when qi, blood, and the fluids are sufficient, and spirit leads hun and po as it should, is a life whole. Hence heart-spirit “presides over hun and po,” as Precepts for Physicians (Yimen Falü) puts it. A comparison: heart-spirit is the conductor, hun is the lift of the melody, and po is the rhythm and the movement of the body. If the conductor loses the beat, melody and rhythm both go out of tune.

(5) Yi, Zhi, the Spleen and the Kidney; Heart-Spirit “Also Takes in the Will”

The supplementary “Treatise on Needling Methods” in the Suwen calls the spleen “谏议之官，知周出焉”—the official of counsel, from whom thorough knowing issues. The hint is that the spleen is tied to deliberation and to knowing that covers the ground. The heart is where thinking begins. There is first the attention and memory of what the heart holds in mind, and only then the spleen’s yi, which transports, transforms, and integrates. “意已决而确然不变者，志也。” What yi has decided, and what then stands firm and does not change, is zhi. So says Essentials of the Inner Classic (Neijing Zhiyao). The kidney stores essence, governs bone, and engenders marrow, and the brain is the sea of marrow. When, with age, the kidney declines, essence is scarce, and marrow is depleted, the sea of marrow gradually empties. Forgetting what came before and losing what comes after, a falling away of interest, and a sunken will are signs that the original spirit is no longer nourished.

Will sits higher than hun and po, and is more complex, so the two are often discussed as a pair. Spleen and kidney—one the root of what is acquired after birth, the other the root of what is given before—support each other. A clear line of thought and a definite aim depend on nourishment from the essence of grain and water and from reproductive essence. The making and the movement of essence and blood, in turn, depend on the heart’s participation. That is why one says heart-spirit “also takes in yi and zhi.” The spleen and kidney are not useless. Activity of the will still has to be gathered by heart-spirit, and it depends on nourishment by heart blood.

Set down in a life, the section looks like this. People who “brood too much” for a long time often report insomnia, poor appetite, abdominal distension, and fatigue. That is a common portrait of dual deficiency of heart and spleen, or of liver constraint with spleen deficiency. People who live with “fear that will not settle,” or with depletion of essence from sexual exhaustion or from age, may show soreness of the waist and knees, tinnitus, forgetfulness, and a timidity that startles easily. Heart and kidney both have to be kept in view. Pattern differentiation belongs to a trained physician. What a reader can do is recognize the pattern, and seek care early, rather than match himself or herself to a formula.

Compressed into plain speech, “presiding over hun and po, and also taking in the will” comes to this. Heart-spirit is responsible for turning the system on and for dispatching the work. Liver-hun handles dreams and the wandering of emotion. Lung-po handles the instincts of body and sensation. Spleen-yi handles the first steps of attention and deliberation. Kidney-zhi handles direction and persistence. Miss any one link and the machine stalls. When the dispatch itself fails, the whole machine is the most likely to fall into disorder together. That is why so many problems touching the mind still come back, in the end, to regulating the heart. The heart is not a cure-all. It is often the hinge.

4. The Heart Governs the Spirit, and the Brain Governs the Spirit—from a Historical Dispute to Heart–Brain Coupling

(1) “The Brain Is the Residence of the Original Spirit,” and the Claim That the Brain Governs It

Li Shizhen, in the Compendium of Materia Medica (Bencao Gangmu), proposed that “脑为元神之府”—the brain is the residence of the original spirit—and so gave a comparatively clear doctrine of a brain-spirit its first strong statement. As Western medicine and anatomy came in, Wang Ang and others discussed in so many words the claim that the brain governs shenming. Wang Qingren, in Correcting the Errors in the Forest of Medicine (Yilin Gaicuo), held that “灵机记性不在心在脑”—the spiritual mechanism and the faculty of memory reside in the brain, not in the heart—and assigned memory, sight, hearing, smell, speech, and related functions largely to the brain. These insights pushed Chinese medicine to face the physical standing of brain and marrow. Their historical weight is real.

Even so, given the limits of ancient dissection and experiment, “the brain governs the spirit” could not, for a long time, simply replace “the heart governs the spirit” as the main clinical axis. Faced with illnesses of the mind, physicians still mostly differentiated patterns among the five viscera, gave weight to the heart, and at the same time replenished essence and benefited marrow, transformed phlegm and opened the orifices, or quickened blood and freed the network vessels. That was a clinical filter at work. Many cases of insomnia, constraint, palpitations of the milder and the severe kind, and mania or withdrawal have repeatable paths of effect when they are regulated from the heart and the related viscera.

(2) A Common Mistake: Treating the Two Claims as Mutually Exclusive

Readers fall easily into two mistakes.

The first mistake is to hear “the heart governs the spirit” as a denial of the brain. The traditional texts use “heart” to include a functional center. The brain, as the sea of marrow and the residence of the original spirit, has all along been written further into the theory. A sounder statement today is this. Chinese medicine’s “the heart governs the spirit” is a model of function in the whole. Western medicine’s “the brain governs cognition” is a model of location in an organ. The two are not answering exactly the same question.

The second mistake is to decide that, once science has shown thinking to be in the brain, Chinese medicine is out of date. Western medicine itself grants the tight links among the heart, emotion, the autonomic nerves, and the hormonal axes. Broken-heart syndrome, the stress cardiomyopathy in which a surge of emotion stuns the heart muscle; the palpitations and chest tightness of a panic attack; the higher cardiovascular risk of people with depression: all of these say that between heart and spirit there is a biological bridge one can measure. Chinese medicine names that bridge “heart-spirit.” Western medicine describes it as a network of nerve, endocrine gland, and immune response. The languages differ. The phenomena sit next to each other.

(3) Chinese and Western Accounts: Talking Past Each Other, or Able to Talk?

Western medicine takes the brain, with its complex neural networks, to be the core organ of learning, memory, the regulation of emotion, and conscious activity. The heart, for its part, guarantees perfusion of the brain by cardiac output, and it joins the regulation of the whole body through receptors, hormones such as atrial natriuretic peptide, and autonomic feedback. In other words: the brain is the central hardware of information processing, and the heart is a key node of perfusion and rhythm; the two keep up a conversation through nerve and body fluid.

Zhang Xichun’s Records of Chinese Medicine with Reference to Western Medicine says: “人之神明，原在心与脑两处。” A person’s shenming resides, from the start, in two places, the heart and the brain. The sentence still helps. There is no need to force a choice of one. Chinese medicine insists on the whole: ordinary activity of thought and spirit needs the heart, the brain, and the other viscera working together. Modern research has also observed that, in some states of attention, emotion, and meditation, the electrical activity of heart and brain can show a more coordinated coupling. When a person is anxious, panicked, or excessively aroused, heart-rate variability falls into disorder, and subjectively one feels “unsettled in heart and spirit.” Chapter 8 of this book, “Heart and Brain in Rhythm,” takes up that shared frequency on its own. The basic attitude can be set down now: heart and brain couple at their best, and only then can shenming be peaceful.

The clinical implication is practical. In treating illnesses of the mind that belong to the “brain system,” Chinese medicine still often enters through the five viscera, with particular weight on the heart, and keeps the kidney’s essence and the brain’s marrow in view at the same time. It should also recognize situations that belong to neurology, to psychiatry, or to emergency care—acute disturbance of consciousness, febrile convulsion, the signs of stroke, risk of suicide—and refer without delay. Chinese and Western medicine do not cancel each other. In the right setting, each does its own work.

In more ordinary words, the heart is like the power supply and the clock, and the brain is like the machine and the screen. If the power is unsteady, a very fine screen still snows and freezes. If the machine is damaged, the steadiest power supply still cannot compute. Historically, Chinese medicine first grasped a large body of clinical regularity on the side of power and rhythm, and later filled in a physical account of the machine. Western medicine first studied the machine with precision, and has come to give more and more weight to the exchange among the heart, the autonomic nerves, and emotion. They meet at the end. Both grant that a person’s shenming is a work of systems, not a miracle at a single point.

5. “The Heart Governs the Spirit” at the Bedside: Reasoning, Kinds of Cases, and Herbs and Foods That Settle the Spirit

“The heart governs the spirit” is not a game of concepts in a study. It runs through the arising and the course of illness, and it is widely used in prevention, in reasoning about cause and mechanism, in principles and methods of treatment, and in the recovery of health. The examples below keep to lines of pattern differentiation and to principles. They do not give doses or details of combination that anyone could take to a pharmacy and fill. Any use of medicine, and any addition or subtraction in food therapy, should be done only after a qualified practitioner of Chinese medicine has differentiated the pattern. Chest pain, fainting, a severe fall in mood, or hallucinations and delusions call for prompt medical care.

(1) Insomnia: The Usual Stage on Which the Spirit Fails to Keep Its House

The mechanism of insomnia can be very complicated, and “heart-spirit harassed, the spirit not keeping its house” is almost always the last common path. The cause may be heart fire flaming upward, or yin and blood insufficient, or phlegm-heat harassing from within, or liver constraint transforming into fire, or deficiency of heart and gallbladder qi. The showings differ. The core is the same: at the time when spirit ought to be quiet, it cannot be quiet.

Treatment often adds, on the basis of the pattern, substances that settle the spirit. The directions, given here only as kinds of reasoning and not as a list to medicate oneself from, include roughly these: fortify the spleen so as to settle the spirit; nourish blood so as to settle the spirit; release constraint so as to settle the spirit; transform phlegm and open the orifices so as to settle the spirit; nourish yin and clear the heart so as to settle the spirit; cool the blood and quicken it so as to settle the spirit; use heavy settlers to submerge yang and settle the spirit. Herbs such as codonopsis root (Codonopsis pilosula, dangshen), spirit poria (the portion of Poria cocos that has grown around pine root, fushen), spiny jujube seed (Ziziphus jujuba var. spinosa, suanzaoren), Chinese angelica (Angelica sinensis, danggui), fleeceflower stem (Polygonum multiflorum, shouwuteng), arborvitae seed (Platycladus orientalis, baiziren), silk-tree flower and its unopened buds (Albizia julibrissin, hehuanhua and hehuanmi), silk-tree bark (hehuanpi), polygala root (Polygala tenuifolia, yuanzhi), grass-leaved sweetflag (Acorus tatarinowii, shichangpu), lily bulb (Lilium, baihe), dwarf lilyturf tuber (Ophiopogon japonicus, maidong), schisandra fruit (Schisandra chinensis, wuweizi), red sage root (Salvia miltiorrhiza, danshen), raw rehmannia root (Rehmannia glutinosa, shengdihuang), dragon bone (fossil bone, longgu), mother-of-pearl (zhenzhumu), and oyster shell (Ostrea, muli) are, in the classics and in the clinic, placed on different paths of settling the spirit. Which of them is chosen, and at what dose, has to be decided by pattern differentiation. The single-ingredient reflex—“insomnia, so take jujube seed”—is a mistake.

At the level of food, the same stress falls on individual difference. Some people are suited to lily bulb, white wood ear (Tremella fuciformis, yiner), and lotus seed (Nelumbo nucifera, lianzi), taken plain, to nourish yin. Some, because the spleen is deficient and damp is abundant, grow more distended and sleep worse if they are given sweet, cloying, enriching food. Some, because of liver constraint, need the more the adjustments of daily life that course the liver and regulate qi, together with professional care. “Medicine and food share a source” is not a prescription written in groceries. It is a support to a way of living and to a medical plan. A regular schedule, a limit on caffeine and alcohol before bed, less blue light, and some dealing with the psychological business left unfinished, usually matter more than one extra “spirit-settling ingredient.”

The heart-spirit mechanism of insomnia can also be written as three common paths, for the sake of understanding. They are still not a basis for diagnosing and treating oneself. The first is “over-raised”: vexation, a bitter taste, yellow urine, a red tongue; spirit has been lifted by fire and heat. The second is “insufficient”: palpitations, a pale face, easy fatigue, a crowd of dreams; spirit drifts because blood is too thin to nourish it. The third is “harassed”: copious phlegm with chest oppression, or the stabbing pain of static blood, or a jumpy unease after a fright; spirit is disturbed from outside and from within. The three paths can overlap and turn into one another, and the principles of treatment are sharply different: clear, supplement, transform, or settle. The wrong direction makes the disorder worse the longer it is pursued. That is why pattern differentiation, and seeing a clinician, are insisted on.

(2) Tics and Other Disorders of Spirit: What It Means to Enter through the Heart

Clinicians have also used the theory that the heart governs the spirit in thinking about illnesses of the tic kind. Frequent blinking, throat-clearing, and abnormalities of speech, as forerunners or companions, can be laid to an unsettled heart-spirit. Odd tics together with a hasty, contrary temperament often call for consideration of liver wind stirring internally and of heart blood insufficient. Factors of “external wind,” such as an outside illness, a nose that will not clear, or discomfort in the throat, may stir the wind within. Treatment may settle the heart and quiet the spirit while extinguishing wind, or it may nourish and course the liver, with help from opening the orifices and disinhibiting the throat, and it gives weight to psychological support and to adjustment of the family setting. Effect varies from person to person. A specialist and a practitioner of Chinese medicine have to assess the case together. Heavy settling drugs, and drugs that extinguish wind, are not to be taken for a long time on one’s own.

Forgetfulness, somnolence, mania and withdrawal, dementia, constraint pattern, sleepwalking, and the like: regulating heart-spirit is often an important link, and the primary disease still has to be made clear. Thyroid disease, anemia, sleep apnea, adverse effects of drugs, cerebrovascular disease, and depressive disorder can all “dress up” as a problem of heart-spirit. Identify the disease first, then differentiate the pattern. Do not skip the investigations that ought to be done, and do not delay the department that ought to be seen.

(3) The Heart-Spirit Thread in Classical Formulas and in Chinese Medical Psychology

Certain classical formulas—Peach Pit Decoction to Order the Qi (taohe chengqi tang), Bupleurum plus Dragon Bone and Oyster Shell Decoction (chaihu jia longgu muli tang), Lily Bulb and Rehmannia Decoction (baihe dihuang tang), Licorice, Wheat, and Jujube Decoction (gan mai dazao tang), and others—have different indications, and each answers, from a different side, to “the heart governs the spirit.” One frees stasis so as to settle the mechanism of spirit. One harmonizes shaoyang, the pivot layer of classical cold-damage theory, and settles fright. One moistens and nourishes heart and lung, or sweetens and moderates the center, so as to ease urgency. Their influence has been long, and they are still in use, which only raises the demand for precise differentiation. When formula and pattern correspond, there is an effect. When they do not, there is no effect, and there may be harm. A reader of case records should learn the line of thought, and should not copy the names of the drugs.

The psychological methods of Chinese medicine—restraining one emotion by another, following feeling and granting what is wanted within measure, shifting the attention and changing the temperament, suggestion and guided explanation, quieting the spirit in meditation—are likewise soaked in the idea that the heart governs the spirit. If spirit is governed by the heart, then changing cognition, emotion, the focus of attention, and the state of the body can settle heart-spirit in return. These methods have their indications and their contraindications. Severe mental disorder needs the standard treatment of modern psychiatry. Chinese medical methods supplement that treatment. They do not replace it.

(4) How to Read Case Reports

When you meet a claim of the sort “such-and-such a formula treated a hundred cases of insomnia,” keep three cautions clear. First, a single case and a small series cannot prove that the formula will work for you. Second, effect in Chinese medicine depends heavily on pattern differentiation and on adjustment at follow-up. Third, herbs that settle the spirit are not free of adverse effects and interactions. Some disturb digestion. Some cause allergic reactions. Some raise questions when combined with Western sedative-hypnotic drugs, anticoagulants, and other medicines. Using “the heart governs the spirit” to understand oneself, and to talk with a clinician, is far safer than using it to write one’s own prescription.

6. To Care for Life, First Care for the Heart: Turning Theory into a Day

Deng Tietao, a National Master of Chinese Medicine, insisted that to care for life one must first care for the heart. Regulate spirit in order to nourish the heart. In one’s thinking, want less for oneself and meet circumstances with ease; let the emotions move freely; and heart-spirit settles. When heart-spirit settles, liver qi reaches more easily, lung qi diffuses more easily, spleen qi grows robust more easily, and kidney qi fills more easily, and the constitution grows stronger. This is the office of the heart as monarch, set down as an order of care: settle the monarch first, and then speak of the hundred officials.

Caring for the heart can be grasped along several lines one can actually follow.

1. Care for the heart of flesh and blood. Regular movement, within one’s capacity; not smoking, and a limit on alcohol; control of blood pressure, blood lipids, and blood sugar; sleep that is actually obtained; a reasonable weight. These can sound like the old refrain of Western medicine. They are also the most reliable means of protecting the material basis of shenming. The heart qi, heart yang, and heart blood of Chinese medicine are not separable from the management of these modern risks.

2. Care for the heart of spirit. Cut down the friction that does nothing. Work without a boundary, a stream of information that does not stop before sleep, and the rehearsing, over and over, of injuries in a relationship, all spend spirit. Leave heart-spirit some blank space: a walk with no purpose, a few minutes of relaxed breathing, one honest conversation, a pursuit in which you can enter flow. All of these nourish spirit.

3. Follow day and night. The old rhythm, “阳气尽则卧，阴气尽则寤”—when yang qi is exhausted, one lies down; when yin qi is exhausted, one wakes—answers to the modern circadian clock. A life turned upside down between day and night injures heart-spirit as readily as anything does. A fixed time of getting up is often more effective than the struggle to “sleep a full eight hours,” which wakes a person further the harder it is pursued.

4. Keep emotion within measure. Joy and anger in proportion does not mean pressing emotion down. It means not living at an extreme for the long term. Anger needs an outlet, grief needs to be seen, fear needs to be calmed. Seeking counseling or psychiatric help when it is needed is itself care of the heart. It is a strength of judgment.

5. Be measured in eating, and do not put faith in “tonifying the heart.” Going too hungry or too full, a craving for the pungent, the spicy, and the roasted, and a long dependence on caffeine to stay propped up, all disturb heart-spirit. Regulation by herbs and food should be individual, and it is best done with guidance from a physician or a dietitian, especially for people with chronic disease and for pregnant women and children.

6. Safety inside relationships. Human beings are social, and heart-spirit is settled inside relationships as well. Being trusted, being listened to, and being needed can improve sleep and the felt sense of the heart rate in a direct way. Long loneliness, humiliation, or control under high pressure tends to leave heart-spirit on a chronic alert. Care of the heart is therefore a private virtue, and it is also a matter of boundaries, of communication, and, when it is necessary, of leaving a harmful setting. If a relationship has already produced depression or anxiety, professional psychological help deserves to come first.

Care of the heart is the work of a lifetime, and it is the hidden line of the chapters that follow. From the rhythm of the heartbeat, to molecule and cell, and on to system and awareness, we keep returning to one sentence: a good life begins with the heart. “Begins with the heart” is an admission. Rhythm, emotion, attention, and what one holds as worth doing all rewrite what happens downstream in the body. If the upstream is left unregulated, no number of patches downstream will hold for long.

7. Set against Modern Life: A Few Ordinary Scenes

To let the theory land, it is worth looking at a few scenes almost every reader will meet.

Scene one: the heart races before one speaks in a meeting. Sympathetic nerves are aroused, the rate climbs, the palms sweat, and subjectively the heart is “beating a drum.” That is ordinary stress. If panic is frequent, social situations are avoided, and life is narrowed, it is time to ask whether an anxiety disorder is present. Chinese medicine can then assist from patterns such as “heart and gallbladder qi deficiency” and “heart-spirit unsettled.”

Scene two: insomnia and chest tightness after a breakup or a death. Emotional injury disturbs the heart directly, and it can involve liver and spleen as well. Allowing grief, keeping to basic meals and to daylight, and, when needed, a short period of medical help, fits the care of the heart better than forcing oneself to “look on the bright side.”

Scene three: the checkup says “the heart is fine,” and palpitations remain. Early beats, autonomic disorder, hyperthyroidism, anemia, and panic are among the different causes. Chinese medicine may differentiate deficiency of the heart, phlegm-fire, or blood stasis. The point is that a Western workup and a Chinese pattern differentiation can proceed side by side. Neither stands in for the other.

Scene four: an older person’s forgetfulness is getting worse. Cognitive disorder and related diseases have to be kept in view. At the same time one may see Chinese medical mechanisms such as insufficiency of kidney essence, emptiness of the sea of marrow, and dual deficiency of heart and spleen. Early assessment matters a great deal. “That’s just age” is not an explanation to stop at.

Scene five: heart-spirit is fragile after childbirth, or in the first recovery from a serious illness. Qi and blood have been abruptly injured, and shenming has lost its nourishment. Copious sweating, palpitations, easy weeping, and insomnia may follow. The family often thinks the person is “thinking too much.” The nearer description is that blood is not nourishing spirit. Blind enrichment, or a forced cheerfulness, can both be the wrong move. Nutrition, sleep, and a gradual return to activity are best recovered under a physician’s guidance, with an eye on postpartum depression and on other situations that need a specialist.

Scene six: the knowledge worker who stays up as a way of life. Coffee carries the day. The phone carries the night to the small hours. Morning brings chest tightness, a bitter taste, and attention that will not gather. On the surface this is a problem of efficiency. Underneath, heart yin is being silently consumed, liver-hun is not returning, and spleen and stomach have lost their harmony. If the regulation is only a spirit-settling drug, and the schedule never changes, the trouble returns. To use “the heart governs the spirit” here is to admit that shenming, too, needs to leave work.

These scenes share one feature. Discomfort in the subjective “heart” is often a signal of an objective state, physiological and psychological. “The heart governs the spirit” trains us to take the signal seriously, rather than mocking ourselves as thin-skinned. When the signal appears, ask three questions first. Is there a structural problem in the body that needs to be investigated? Has emotion been pressed down for a long time? Has the rhythm of life been overdrawn, and kept overdrawn? After those three questions, talk of enrichment and of settling the spirit has a much clearer path.

8. A Reader’s Check: How Is Your Heart-Spirit?

The questions below are for self-observation. They do not replace a diagnosis. If several of them have been clearly present for a long time, seek help from a medical institution.

1. In the past month, have you often found it hard to fall asleep, woken early, or slept lightly with many dreams, and been drowsy and irritable in the day because of it?
2. Do you often feel palpitations or chest tightness, clearer with activity or with shifts of mood, and still put off the relevant examinations?
3. Has attention clearly declined, so that reading and work are hard to sustain, and you frequently forget things?
4. Do your emotions swing widely, or have low mood and a loss of interest lasted more than two weeks?
5. Are your complexion and your gaze clearly more worn and less spirited than before, and have people in the family noticed the same?
6. Do you depend on coffee, alcohol, or sleeping drugs to maintain a basic level of function?
7. Do you live for long stretches with the feeling that the body is at rest and the mind will not stop?
8. When conflict comes, do you rehearse it over and over, to the point that eating and sleep are affected?
9. Is there any relationship, pursuit, or small ritual that leaves you feeling safe and settled?
10. If you already have heart disease, high blood pressure, diabetes, or a similar condition, have you at the same time neglected emotion and sleep?

If the check shows you a risk, turn “the heart governs the spirit” into an action: make the appointment, change the schedule, ask for support. A theory is worth something when it changes the next choice.

9. Summary of the Chapter

“The heart governs the spirit” has a double structure. The heart of flesh and blood governs the vessels so as to carry spirit. The heart of spirit governs the mental life so as to answer what the world presents. Its content can be grasped in five aspects: the root of life, the bloom in the face, knowing and memory, the holding of the emotions, and the root of temperament. The five viscera store spirit. Hun, po, yi, and zhi each have their office, and heart-spirit presides over them and takes them in. Heart and brain once had a historical argument over who governs shenming. In our own time they are better understood as coupled, and as becoming spirit together. In the clinic and in the care of life, settling the spirit begins with pattern differentiation, and caring for the heart has to be carried out in the vessels, the emotions, sleep, and the way of life. Herbs and food can help. They are not a basis for writing one’s own formula.

This chapter began from the classics and drew a basic map of heart and spirit. A map still needs the original beat. One has to hear how the heart lives by opening and closing, and how xindong—the heart moved—names at once a physical contraction and a psychological one. In the next chapter, “What a Heartbeat Means,” we start from that most palpable rhythm, enter the tempo of a life, and carry “the heart governs the spirit” from a concept to the scene of the body itself.