兌 → 大過
Hexagram 58: The Joyous Lake → Hexagram 28: Great Exceeding
Changing Lines
This transformation involves 2 changing lines (lines 1, 3).
Line 1
初九 和兌吉。
Nine at the beginning means: Contented joyousness. Good fortune.
Line 3
六三 來兌凶。
Six in the third place means: Coming joyousness. Misfortune.
Trigram Changes
Yilin Verse
符左契右，相與合齒。乾坤利貞，乳生六子。長大成就，風言如母。
Tally left, contract right, joining together tooth to tooth. Qian and Kun are beneficial and correct; nurturing and bearing six children. Grown to completion, reputation spreads like the mother's name.
— Jiao Yanshou, Yilin (Forest of Changes), 1st century BCE
Commentary
Paired lakes meet wind beneath the lake — Great Exceeding, where the ridgepole bends under extraordinary weight. Tally left and contract right fit together tooth by tooth; Qian and Kun, steadfast and fruitful, give birth to six children. They grow to maturity, and their speech carries the mother's wind. The verse describes cosmic generation: the perfect matching of yin and yang produces the six derivative trigrams (Zhen, Kan, Gen, Xun, Li, Dui). From The Joyous to Great Exceeding, the ordinary joy of family becomes something structurally extraordinary — a generative act so complete that it strains the frame of normalcy. Creation at this scale always exceeds the vessel that contains it.
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