Peace

Hexagram 11 is Earth over Heaven, and the arrangement looks wrong until the logic is stated, at which point it becomes one of the most elegant things in the book.

Heaven's tendency is to rise; Earth's is to sink. Put Heaven underneath and Earth on top and the two are moving towards each other. They meet, interpenetrate and exchange, and the result is called Peace, or Prosperity, or Advance depending on the translation. Put them the conventional way up, Heaven above and Earth below, and each moves away from the other; nothing meets; and the resulting hexagram, number 12, is Standstill or Obstruction.

The two figures are exact inversions and they sit side by side in the King Wen sequence, which is the clearest single demonstration that the sequence is structured rather than arbitrary. Whatever else King Wen's order is, it is not random, and pairs of this kind run through it from beginning to end.

The reading of hexagram 11 is favourable and unusually unqualified: a period in which things connect, communication works, and the small departs while the great approaches. The caution is in the lines rather than the judgement. The third warns that no plain is without a slope and no going without a return, and the top line has the city wall falling back into the moat. Peace in this book is a phase, not an achievement, and the text says so at both ends of the figure.

The trigram logic just described is itself a product of the Ten Wings rather than of the oldest layer. The core text gives judgements and line statements; the reading of hexagrams as two stacked trigrams with characteristic motions is a commentarial system, and a very good one, laid over material that predates it.

Favourable hexagrams are harder to read well than difficult ones, because the temptation is to stop at the judgement.

Hexagram 11 rewards going further. Its middle lines describe the conditions that make the good period work: bearing with the uncultured, crossing the river on foot, not neglecting what is distant, and acting without partisanship. That is a set of instructions about how to behave during a favourable time, and it assumes the favourable time is an opportunity to do something rather than a reward for having done it.

The top line is the sharp one. The wall falls back into the moat from which its earth was dug; do not use the army now; and the text adds that perseverance brings humiliation. A hexagram named Peace ends with a warning against military action and a collapse of fortification. Whoever assembled these lines was not offering reassurance.

The counterpart, hexagram 12, is the same figure inverted and describes the opposite condition: heaven and earth not communicating, the great departing and the small approaching. Together the two are the book's basic statement about how periods work, and reading either alone loses half of it.

Translations agree closely here, which is worth noting. Where the imagery is concrete, walls, moats, rivers, armies, Wilhelm, Legge and the later manuscript-based versions converge. It is on the abstract judgements that they diverge, which is a useful rule of thumb for anyone weighing how much interpretive weight a passage will carry.