Two lakes side by side, each feeding the other. Dui is pleasure, and specifically the shared kind: conversation, company, saying things aloud. The hexagram is warm and it is the most cautious warm figure in the book.
Fifty-eighth in the King Wen order. The Sequence places it after The Gentle: what has entered somewhere is then received with pleasure, and Dui is the name the book gives that pleasure.
The Judgement is two clauses: Dui. Things go through. It pays to hold to this.
That is one of the shortest Judgements in the book, and the brevity is worth noticing in a hexagram about talking. Nothing is promised beyond passage and the value of persistence. What the text conspicuously does not say is that the pleasure is good for you, or that it lasts, or that it should be pursued. Dui is approved and left unelaborated, and the six line texts then spend their whole length distinguishing the kinds of pleasure that hold from the kinds that do not.
The Image: lakes resting one on another. The noble person joins with friends to talk things over and practise together.
Two lakes that touch replenish each other; neither drains. The conduct drawn from that is unusually specific and unusually social. Most Images recommend a private discipline. This one recommends company, and names two activities: discussion and rehearsal. Both are things you cannot do alone, and both involve saying a thing out loud in front of someone who might disagree. The Image is treating pleasure as a working method rather than a reward, which is a claim about learning as much as about enjoyment.
Dui is the trigram of the lake, and its other meanings are speaking and pleasure. The three run together in the Chinese in a way English cannot hold in one word: an open surface, an open mouth, and the satisfaction of both. The trigram is two firm lines with a yielding one on top, which is the standard diagram for something solid that presents a soft, reflective face.
Doubled, it gives the hexagram of shared pleasure. Not private contentment: the kind that requires another person. Conversation, agreement, being in good company, the specific enjoyment of being understood. This is one of only eight hexagrams built from a repeated trigram, and the repetition means the quality is presented undiluted.
What makes the hexagram interesting is how nervous it is about its own subject. Three of the six lines are warnings, and they distinguish pleasure that arises from what is actually the case from pleasure that has been sought out, solicited, or manufactured. What changes with the question: asked whether something is enjoyable, the hexagram says yes and does not care. Asked whether the enjoyment is sound, it becomes exacting, and the test it applies is where the pleasure came from rather than how much of it there is.
In a relationship question Dui is the pleasant part, and the text takes it seriously as a subject rather than as decoration. Enjoying someone's company is a real thing to build on and the hexagram says so.
The third line is the caution that matters here. It describes coming joy, pleasure that is gone out and fetched, and calls it misfortune. The distinction is between enjoying a person and requiring them to be enjoyable. The sixth line names the same failure from the other side: pleasure that draws someone in. What the hexagram cannot tell you is whether the warmth you are receiving is the first kind or the second, and it does not report on anyone's motives.
At work this is the team that talks, the culture where disagreement is survivable, the room in which the difficult thing gets said and nobody is punished for it. The Image's pairing of discussion with practice is the whole recommendation.
The fifth line is the warning for anyone senior. It describes trusting what is wearing away, placing confidence in something already coming apart, and calls it dangerous. Agreeable surroundings make that easy to do, because nobody enjoys being the person who says the thing is failing. Dui describes conditions in which candour is possible; it does not guarantee that candour is happening, and the difference is worth checking.
In a money question Dui is a weak fit and it is more honest to say so than to force it. The hexagram is about shared pleasure, and where it touches money at all it touches spending: the outlay that buys company, hospitality, the enjoyable thing.
It has no view on amounts and gives no signal about any decision. The one useful thing it contributes is the third line's distinction, which applies here as well as anywhere: pleasure that follows from a situation costs nothing extra, and pleasure that has to be gone out and bought is a different transaction. Whether you can afford either is a question for your records.
Say the thing you have been enjoying not saying. Do it this week. The Image pairs pleasure with discussion for a reason: a room that is comfortable because a subject is being avoided is not the hexagram, it is the third line. Pick the person and the sentence, and say it while the surroundings are still friendly enough to absorb it.
Yang in a yang place, correctly placed, at the bottom. The text is two words and a verdict: harmonious pleasure, good fortune. This is the only line in the hexagram with nothing attached to it, no condition and no warning. A strong line at the base has no one below it to court and nothing yet to lose, so its pleasure has no motive in it. Changing it produces Hexagram 47, Oppression.
Yang in a yin place, so not correctly placed, but central in the lower trigram. Sincere pleasure; good fortune; remorse disappears. The remorse being cancelled is the tell: an incorrectly placed line normally carries some regret, and here sincerity discharges it. Being in the middle is what makes that possible. What the text credits is not the enjoyment but the fact that it is not being performed. Changing it produces Hexagram 17, Following.
Yin in a yang place, incorrectly placed, and the first outright misfortune. The text is coming pleasure: enjoyment that has been gone out after and brought back. A weak line in a strong position has nothing of its own and solicits from elsewhere. This is the hexagram's central distinction stated in three characters, between pleasure that arrives and pleasure that is fetched. Nothing in the line suggests the pleasure was not real. Changing it produces Hexagram 43, Breakthrough.
Yang in a yin place, incorrectly placed, and the most awkward line in the figure. Pleasure being weighed up is not at peace; after the affliction is fenced off, there is gladness. Someone is calculating between two sources of enjoyment and cannot settle, and the resolution comes only when something is deliberately shut out. This is the one line in the hexagram where a decision has to be made. Changing it produces Hexagram 60, Limitation.
Yang in a yang place, central and correct, the ruling line, and it still carries danger. Sincerity toward what is wearing away brings peril. The line is placed well and trusts something that is disintegrating, which is exactly the failure a pleasant environment produces: the strongest position in the hexagram is the one most insulated from bad news. Correct placement is no protection against misplaced confidence. Changing it produces Hexagram 54, The Marrying Maiden.
Yin in a yin place at the top, correctly placed, and the text gives no verdict at all: seductive pleasure, or pleasure that draws others along. Neither good fortune nor misfortune is attached. That is the whole line. The omission is deliberate and it is the hexagram's last word on its own subject. Pleasure used to lead someone is left standing there, unjudged, for the reader to weigh. Changing it produces Hexagram 10, Treading.
Both trigrams are Dui, Lake. The trigram is two firm lines with a yielding line above them, which reads as strength inside and openness at the surface. Doubled, the figure gives the quality without dilution: this is one of the eight hexagrams built from a repeated trigram, and the tradition treats those eight as naming their trigram's nature in pure form.
The nuclear hexagram, from lines two to five, is Hexagram 37, The Family. Inside shared pleasure sits the most rule-bound figure in the book, a hexagram about defined roles and who speaks to whom. That is a sharp thing to find here, and it is useful: enjoyable company is not structureless, and what makes it possible is usually a set of understandings nobody states.
The inverse is Hexagram 57, The Gentle, this figure turned over, where the doubled trigram is Xun and the quality is penetration rather than expression. The opposite, every line reversed, is Hexagram 52, Keeping Still: doubled mountain, the trigram of stopping set against the trigram of speaking.
The Zhou oracle layer, roughly ninth century BCE, gives six terse statements about kinds of pleasure and very little else. The word at the centre, read as both lake and speech and delight, is doing three jobs at once in the original, and the ambiguity is not a translation problem but a feature of the character.
The eight doubled trigrams occupy fixed structural positions in the King Wen order, and Dui is the last of them. That arrangement belongs to the ordering itself rather than to any commentary, and it means this hexagram is carrying the pure form of its trigram by design.
The Ten Wings, compiled between about the fourth and second centuries BCE, supplied the Image with its recommendation of friends, discussion and practice. That instruction has had a long institutional afterlife in Chinese education, where joint study was the standard method, and it is one of the more concrete pieces of advice the Wings ever produce.
In English, James Legge's 1882 translation is public domain and renders the name as Pleased Satisfaction, which is clumsy and close to the Chinese. Richard Wilhelm's German of 1924, into English by Cary Baynes in 1950, gives The Joyous, Lake, and that title has made the hexagram sound sunnier in English than the line texts warrant. Three of the six lines are warnings.
Dui gets read as a straightforwardly happy hexagram, and the English title does most of that work. Half its lines are cautions. The text is not against pleasure, but it spends most of its length sorting pleasure into kinds, and the two it warns about are the ones a person seeks out. Reading this as good news about a nice time skips the entire argument.
The second misreading takes the Image's recommendation of friends and discussion as a licence for agreeable company. The Image says discussion and practice, both of which involve being corrected. A group that is pleasant because nothing difficult is said satisfies the mood of this hexagram and not the instruction, and the fifth line is specifically about the danger of trusting what is comfortable while it comes apart.
The third is about the sixth line, which most treatments render as seduction and then condemn. The Chinese attaches no verdict at all. It says pleasure that draws others along, and stops. The text is describing influence through enjoyment without deciding whether it is manipulation or leadership, and supplying the missing verdict is the commentator's judgement, not the book's.
Put a real question to the coins.