Chapter Four: Why Zilu Asks About "Holding Fullness," Not "Guarding the Mean"

Once Confucius finishes demonstrating the tilting vessel, he sighs: "How could there be a thing that is full and does not overturn!" Zilu asks at once: "May I ask whether there is a way to hold fullness$14"

This question seems, at first glance, to miss the point — the vessel has just demonstrated that "centered, it stands upright" is the ideal state, so why does Zilu not ask "how does one guard the mean," but instead ask specifically "how does one hold fullness"$15

In fact, this question strikes precisely at the most crucial pivot of the entire chapter. Without understanding this question, one cannot understand Confucius's answer.

First Layer: The Question Arises from the Man Himself

To understand Zilu's question, one must first understand Zilu himself.

Zilu's given name was Zhong You, and his courtesy name was Zilu (also Jilu); among Confucius's disciples he was known for his valor and love of courage. The Analects, in "Xianjin," records a famous arrangement in Confucius's assessment of his disciples: "You Zilu takes on the work of two, so I hold him back." Zilu always did the work of two people at once, so I always had to hold him back a little. "Qiu Ran Qiu holds back, so I push him forward." Ran Qiu always hung back and hesitated, so I always had to give him a push.

Zilu was a man of vigorous spirit and keen determination. He was not content with a half-full vessel; what he wanted was fullness — full accomplishment, full valor, full renown. His temperament meant that he would never ask a question that sounded as passive and conservative as "how does one guard the mean." What he asks instead is: "I know I am going to become full — what then$16 Is there a way to be full and still not overturn$17"

This is the most honest way such a spirited person could ask the question. He does not pretend he can avoid becoming full; he does not pretend to be content with half-fullness. Instead he acknowledges that he will inevitably pursue fullness — and then asks whether, once he has arrived there, there is any way out.

Confucius's ordinary teachings to Zilu were aimed precisely at this trait of his character. The Analects, in "Shu'er," records Confucius saying: "One who would fight a tiger bare-handed or cross a river without a boat, and die without regret — I would not go into action with such a person. I must have someone who approaches an undertaking with due apprehension, and who succeeds through careful planning." Someone who fights a tiger bare-handed, who fords a river on foot, and would die without regret — I will not act together with such a person. The person I want to act with is one who, facing a great matter, holds it in reverent apprehension, plans thoroughly, and thereby succeeds. This passage can almost certainly be taken as spoken to Zilu. The four words "approaches an undertaking with apprehension" (临事而惧) are simply another way of expressing "meeting courage and strength that steady the age, guard it with timidity."

Zilu's eventual end confirms exactly what Confucius feared. Zilu died in the chaos of the state of Wei, charging into battle without hesitation even though he knew he could not prevail. The Zuo Tradition, fifteenth year of Duke Ai, records that during the fighting his cap-strings were cut through; he said, "The noble person, though dying, does not remove his cap," retied his cap-strings, and was then killed. This was a man who, to his death, would never "diminish" — would not diminish his valor, would not diminish his sense of duty, pouring his full-blooded spirit in to the very last, until at last "fullness overturned." His death was heroic — but it was also, precisely, the tragic answer to the question he himself had posed before the tilting vessel in Duke Huan of Lu's temple: there is indeed a way to hold fullness, but in the end, he did not achieve it.

Second Layer: The Question Arises from the Nature of Circumstance

"Guarding the mean," taken as a fixed, static goal, cannot in reality be held. Because the water of a human life is being poured in automatically — you cannot stop yourself from growing older, cannot stop yourself from learning more, cannot stop (if you have any talent at all) the accumulation of achievement and fame. A vessel can remain at half-full, because no one continues pouring water into it; but a human life cannot be made to stop — time is not yours to command.

The real question was never "how does one avoid becoming full" — that is impossible, unless one is dead or incapacitated — but rather "once full, how does one avoid overturning." Zilu's question grasps this crux precisely: he does not ask about the vague and intangible "guarding the mean," but about the concrete and pressing "holding fullness."

Third Layer: The Question Arises from Principle Itself

Looked at more deeply still, if one understands "the mean" as a fixed marker to be held onto rigidly, this in fact violates the very spirit of the doctrine of the mean.

Mencius, in "Jinxin I," offers an extremely incisive criticism on exactly this point: "To hold to the mean without discretion is no different from holding to one extreme. The reason we dislike holding to one thing is that it injures the Way — raising up one thing while abandoning a hundred others." To grip rigidly onto the "middle" position without knowing how to weigh and adapt is no different from gripping rigidly onto either extreme. The reason we detest "holding to one thing" is that it damages the Way — grasping one thing while discarding all the other hundred.

What this passage means is: if you treat "the mean" as a fixed position to hold onto rigidly, then what you are holding is not "the mean" at all, but merely another form of "extreme." True "mean" is not a position, but a dynamic equilibrium adjusted at every moment, according to time and circumstance.

The "Tuan" commentary to the hexagram Meng (Youthful Folly) in the Book of Changes sums up this dynamic notion of the mean in two characters: "timely centeredness" (时中). The mean is not a static marker, but a capacity that changes together with time — finding, within each concrete situation, the point that is fitting there. This point may lie here in one situation, and somewhere else entirely in the next.

So "guarding the mean," in a strict sense of principle, is a false question — you cannot possibly "guard" a target that is constantly moving. All you can do is continually adjust, so as not to stray too far. "Holding fullness," by contrast, is the real question — because "fullness" is a definite, perceptible state; you know when you have reached it, and then you must ask: once there, what next$18

Fourth Layer: The Deeper Logic of the Question-and-Answer Structure

The most crucial layer lies in seeing clearly the structure of this question and answer.

Confucius sighs: "How could there be a thing that is full and does not overturn!" — this concerns the vessel, an inexorable law: no vessel, once full, fails to overturn. This is an absolute, irresistible law of nature.

Zilu asks: "May I ask whether there is a way to hold fullness$19" — this concerns the person, a question of possibility: can a person overcome this necessity$20

Confucius answers: "There is a way." — this answer amounts to a declaration of the central proposition of the entire chapter: what distinguishes a person from a vessel is that a person can dip water out of themself.

A vessel cannot ladle out its own water. Once water is poured in, the vessel can only passively receive it, until it overturns. A vessel has no hands, no will, no choice.

But a person can. A person has hands (able to dip), has will (able to decide to dip), has choice (able to decide how much to dip). This is human freedom, and it is also human dignity — faced with the iron law that "fullness overturns," a person can, through self-dipping and self-diminishment, maintain uprightness at the center, and thereby transcend the fate of a mere vessel.

And looking closely at Confucius's answer, "guarding the mean" has in fact not been discarded at all — it has been internalized. "Cleverness and sagely wisdom" is outward fullness, and "foolishness" is inward emptiness; "merit that covers the whole world" is outward fullness, and "yielding" is inward emptiness; "courage and strength that steady the age" is outward fullness, and "timidity" is inward emptiness; "wealth possessing all within the four seas" is outward fullness, and "humility" is inward emptiness.

None of the outward "fullness" needs to be abandoned — you may go on being clever, go on having accomplishment, go on being valorous, go on being wealthy. But the water level within must always be pressed down onto "the mean" — pressed down by foolishness, yielding, timidity, and humility.

Outwardly hold fullness; inwardly guard the mean. Zilu asks about the outward; Confucius answers about the inward. This is exactly what is meant by "the noble person seeks it in themself."

Two Different Prescriptions from Confucianism and Daoism

It is worth noting side by side that "holding fullness," or "holding what is full" (持盈), was a shared concern across the various pre-Qin schools of thought. But Confucianism and Daoism offer two different prescriptions.

The Daoist prescription: do not hold — withdraw. The Laozi, chapter 9, states this with utter decisiveness: "Better to stop than to keep holding a vessel that is already full. Hammer a blade to its sharpest, and it cannot stay keen for long... When the task is done and one's fame established, to withdraw is the Way of Heaven." Holding up a vessel that is already brimming full is not as good as simply setting it down. Whet a blade to its utmost sharpness, and it cannot hold its edge for long. To withdraw once the work is accomplished — this is the way of Heaven.

The Guanzi, in "Baixin," strikes the same note: "To hold on and keep it full — this is precisely where danger lies." To keep holding a full cup upright — the danger is right there.

The most famous practitioner of this path is Fan Li. The Discourses of the States, in "Discourses of Yue II," records Fan Li discoursing on "the one who holds fullness must align with Heaven" — one who holds what is full must accord with the Way of Heaven. And what is the Way of Heaven$21 "The Way of Heaven is to be full without overflowing, to be great without arrogance, to labor without boasting of one's achievements." Full without spilling over, grand without pride, laboring hard without flaunting one's accomplishments. After Fan Li helped King Goujian of Yue destroy the state of Wu, he withdrew once his task was done, "boarding a light skiff to drift upon the Five Lakes" — a single small boat, vanishing into the misty waters of Lake Tai. This is the Daoist form of "holding fullness": not to hold at all, but to withdraw. Pour all the water out of the vessel, and give up even the vessel itself.

The Confucian prescription: one may hold, and hold by diminishing. Confucius's answer is entirely different from the Daoist one. He does not say "set down your achievements," "retire into the mountains and forests," "withdraw once your task is done." What he says is: you may go on being clever, but guard it with foolishness; you may go on having accomplishment, but guard it with yielding; you may go on being valorous, but guard it with timidity; you may go on being wealthy, but guard it with humility.

One's position need not be abandoned, yet the heart yields of itself; one's undertakings need not be relinquished, yet one's bearing restrains itself of its own accord. You need not withdraw, but you must diminish — what is diminished is not your position, but your bearing; not your enterprise, but the disposition of your spirit.

The same diagnosis — fullness overturns — but two prescriptions: Daoism treats it by withdrawal, Confucianism treats it by diminishment. One might say Daoism is more thorough, pulling the firewood from under the pot, settling the matter once and for all; one might equally say Confucianism is more responsible, because society needs some to remain in their positions — the sages cannot all retire into the mountains and forests, and the affairs of the world must, after all, be carried out by someone. The Confucian "way of holding fullness" is a prescription prepared for those who cannot withdraw, will not withdraw, ought not to withdraw.

This is precisely one point where the paths of Confucianism and Daoism diverge. Daoist freedom lies in letting go; Confucian freedom lies in holding on — letting everything go to drift upon the Five Lakes is one kind of freedom, and holding everything while keeping a heart as empty as a valley is another kind of freedom. Two freedoms, two states of attainment, two answers to the question of "fullness overturns."