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64 Hexagrams / 61

Zhong Fu · Inner Truth

Sincerity grows from the centre; never let volume outrun substance.

Judgment and Plain-Language Notes

Zhong Fu: Good fortune extending to pigs and fish. Crossing the great river is beneficial; steadfast correctness is beneficial.

The Tuan commentary describes the structure as yielding within and firmness holding the centre: pleased and gentle, such trust transforms a whole state. Trust that reaches even pigs and fishes is auspicious. Crossing the great water works because the wooden boat is hollow, and it is the hollowness that floats. The Xiang image is wind over the lake, with the noble person deliberating over cases and staying execution.

Xun above, Dui below. Wind moves over the lake, the water answers, and inside and outside respond to one another. This is the hexagram of trust. Zhong Fu means sincerity that grows from the centre rather than being arranged for show. The judgement says the sincerity that reaches even pigs and fishes is what counts, that such trust is what lets you cross the great water, and that correctness is required. The lines move from settling the heart on one thing, through a crane calling and its young answering, unsteady feeling in front of a rival, leaving a companion to go upward, trust that binds people together, and finally a sound that climbs to heaven while the substance stays on the ground. How far sincerity travels depends on whether it is real or merely loud.

The judgment's three statements are positive, and its commentary highly praises transformation of the state and response to Heaven. The first nine has prepared good fortune, the fourth six and fifth nine no blame, and the second's answering cranes provide one of the text's warmest images of response. The top nine lowers the assessment: a cock's cry rising to Heaven brings misfortune, and the Image questions how reputation beyond substance can last. The third's alternating drumming, stopping, weeping, and singing also shows unsettled feelings. Inner conditions are good, with a final risk of unreality, hence the rating: Rather Good rather than the best. This is the app's interpretation of the text, not a guarantee of outcomes.

Worth doing: build credit through real action, and understand the other person before stating your own position. Avoid: substituting fine words for substance, or asking for trust while refusing to be checked.

Understand This Hexagram Through Its Structure

Xun above, Dui below: four solid lines outside and two broken within — hollow at the core.

The lower trigram of Zhong Fu is Dui: two solid lines with a broken third. The upper is Xun: a broken fourth line with two solid above. The third and fourth lines are broken and the other four are solid, so the broken lines sit exactly at the centre.

The two central lines are empty and the four outer ones solid. Emptiness at the centre is read as an open mind: nothing has been packed in first, so what is said can get in. Sincerity here is not good manners but a structural vacancy. Zhong Fu and Da Guo form a contrast — Da Guo is full in the middle and thin at the ends, Zhong Fu hollow in the middle and solid around. Swapping the halves of Zhong Fu gives Da Guo; flipping all six lines gives Xiao Guo instead.

A teaching example, not a prediction: at a review meeting the facilitator withholds any conclusion and lets everyone finish describing what they saw. Zhong Fu describes that structure of leaving room.

The Six Lines: Original Text and Reflection

Nine at the beginning: Preparedness brings good fortune. Other attachments prevent peace.

The Xiang commentary says the good fortune of weighing things carefully at the start rests on a will that has not yet shifted. Where something else is also being sought, there is no rest.

At the beginning of trust, settle your own heart and weigh the matter properly, and it goes well. Keep another option in mind and you will not be at ease.

Before starting anything that depends on long-term trust, confirm that this is genuinely the only thing you want to do. People with a foot in two boats sleep badly in both.

What fallback are you still holding onto behind the thing you just agreed to?

Nine in the second place: A crane calls in the shade; its young answer. I have a fine cup of wine and will share it with you.

The Xiang commentary says the young answering comes from genuine willingness in the heart, not from anything applied from outside. A crane calls from a hidden place and is answered.

A crane calls where nobody can see it and its young answer of their own accord. I have good wine and will share it with you. A true call finds a response without any performance in front of an audience.

Work seriously where nobody is watching and the people who understand will come to you. Rather than trying to be seen by everyone, keep what is worth sharing for those who actually answer.

Who responded to you recently without you having promoted anything?

Six in the third place: Finding a counterpart: now drumming, now stopping, now weeping, now singing.

The Xiang commentary attributes this swinging between drum and halt to a position that does not fit. The received text of the commentary differs slightly from the line text and is kept as it stands.

You meet a match for yourself and swing between attacking and stopping, weeping and singing, entirely led by the other side. The trouble is not that the rival is strong but that you are standing in the wrong place.

When someone or something sends your feelings up and down, hold off on reacting. Usually you have put yourself in a position that was never yours to contest from.

Who or what has been swinging your mood several times in a single day?

Six in the fourth place: The moon is nearly full; the horse's mate is lost. No blame.

The Xiang commentary explains the lost pair of horses as cutting the tie to one's own kind in order to turn upward, which is why no fault attaches. The moon is nearly, not quite, full.

The moon is close to full but not yet there, and the horse that ran alongside is gone. Leaving the old companion to give your attention upward brings no fault.

Moving to a higher place sometimes means leaving the people who walked beside you. It is not betrayal; the directions have parted, and a proper goodbye serves better than dragging each other along.

Is there a partnership that has quietly reached the point of going separate ways?

Nine in the fifth place: Sincerity binds closely. No blame.

The Xiang commentary says the binding quality of this trust holds because the position is properly correct: there is standing enough to carry the connection.

Sincerity binds those above and below firmly together, and no fault attaches. It works because the place you occupy is legitimate to begin with.

When you are the person holding everyone together, what carries it is not technique but people believing what you say. Promise less and deliver more exactly, and the link holds.

The last promise you did not keep, does the other person still remember it?

Nine at the top: A cock's cry rises to Heaven. Persistence brings misfortune.

The Xiang commentary asks how a sound climbing to heaven can last. The bird's cry rises while the bird does not, and reputation detached from substance cannot be sustained even if held to.

The cry has gone up into the sky and the bird has not followed. When trust at its far end becomes nothing but volume, holding to it carries danger.

When your reputation, slogan or claim is running ahead of what you have actually delivered, the trouble is waiting behind it. The move is to fill in the substance, not to raise the volume again.

How far apart are the version you tell others and the version you have delivered?

Try It Yourself

Swap the halves so Xun moves down and Dui moves up, and watch the two central lines change.

This page has a hands-on exercise. It is built into the Traditional Chinese page: open the interactive exercise.

Quick Quiz

Which two lines of Zhong Fu are broken?
  • The third and the fourth
  • The first and the sixth
  • The second and the fifth
View answers and explanations for every option

The third and fourth lines (Correct) : Correct. The broken lines occupy the two central positions.

The first and the sixth : Broken lines at both ends form Da Guo.

The second and the fifth : Those two lines are solid.

Which operation turns Zhong Fu into Da Guo?
  • Swap the two halves
  • Flip every line
  • Turn the whole figure upside down
View answers and explanations for every option

Exchange the upper and lower trigrams (Correct) : Correct. Zhong Fu has Dui below and Xun above. Exchanging them gives Xun below and Dui above, reading upward as broken, solid, solid, solid, solid, broken: Da Guo.

Flip every line : Changing all six lines makes the two middle lines solid and the four outer lines broken, producing Xiao Guo rather than Da Guo.

Turn the whole figure upside down : Zhong Fu's lines are already symmetrical; turning the diagram upside down still gives Zhong Fu.

Why does a hollow centre read as sincerity?
  • Nothing was packed in first, so what is said can get in
  • Because of good manners
  • Because the two central lines are solid
View answers and explanations for every option

Without filling the space with preconceptions, words can enter (Correct) : Correct. Sincerity here means leaving structural space, rather than describing someone's personality.

Because of good manners : The hexagram concerns structure rather than attitude.

Because the two central lines are solid : The middle two lines are broken.

Source: Wikisource, Zhouyi. Classical text in the public domain; digital edition under CC BY-SA 4.0 . revid 2404990 (original text checked against the Wikisource MediaWiki API revisions response on 2026-09-24). Source wu, yu, shuo, and ji are retained. The second nine's Image keeps yuan in “the heart's wish” rather than its alternative. The third six's Image says “may drum or stop,” slightly differing from the line's “now drumming, now stopping”; this discrepancy follows the source without correction. Wikisource conversion markup is removed, keeping enclosed forms unchanged. The source diagram says “Dui below, Xun above,” matching linesBinary 110011. Accessed 2026-09-24. CC BY-SA 4.0 . This page retains the original app's arrangement of the classical text and plain-language teaching, reformatted for the web.

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