豫 → 履
Hexagram 16: Enthusiasm → Hexagram 10: Treading
Changing Lines
This transformation involves 4 changing lines (lines 1, 2, 5, 6).
Line 1
初六 鳴豫。凶。
Six at the beginning means: Enthusiasm that expresses itself Brings misfortune.
Line 2
六二 介于石。不終日。貞吉。
Six in the second place means: Firm as a rock. Not a whole day. Perseverance brings good fortune.
Line 5
六五 貞疾。恆不死。
Six in the fifth place means: Persistently ill, and still does not die.
Line 6
上六 冥豫。成有渝。无咎。
Six at the top means: Deluded enthusiasm. But if after completion one changes, There is no blame.
Trigram Changes
Yilin Verse
精華墮落，形體醜惡；齟齬挫頓，枯槁腐蠹。
Vital essence fallen away, form grown ugly and vile; ill-fitting and stumbling, withered, decayed, and worm-eaten.
— Jiao Yanshou, Yilin (Forest of Changes), 1st century BCE
Commentary
Thunder once shook the earth with vitality, but now all essence has fallen away. The body grows ugly, movements become clumsy and halting, and what remains is withered, rotted, and worm-eaten. The verse traces a complete arc of decline — from vital spirit to hollow husk. Every term intensifies the previous: 'fallen essence' gives way to 'ugly form,' then 'clashing and stumbling,' and finally 'dried rot infested with beetles.' From Enthusiasm to Treading, the transformation is paradoxical: Treading's image is heaven above and lake below, the careful distinction of high and low. When one treads upon the tiger's tail without proper discernment, the result is this bodily collapse — enthusiasm spent recklessly leaves nothing but the shell of what once lived.
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