革 → 需
Hexagram 49: Revolution → Hexagram 5: Waiting
Changing Lines
This transformation involves 2 changing lines (lines 2, 4).
Line 2
六二 巳日乃革之。征吉无咎。
Six in the second place means: When one's own day comes, one may create revolution. Starting brings good fortune. No blame.
Line 4
九四 悔亡有孚。改命吉。
Nine in the fourth place means: Remorse disappears. Men believe him. Changing the form of government brings good fortune.
Trigram Changes
Yilin Verse
太王為父，王季孝友。文武聖明，仁政興起。旦隆四國，載福綏厚。
Great King was the father; King Ji was filial and brotherly. Wen and Wu were sagely and wise; benevolent rule arose. Dan brought the four states to greatness, bearing blessings rich and deep.
— Jiao Yanshou, Yilin (Forest of Changes), 1st century BCE
Commentary
Fire within the lake transforms into clouds gathering over heaven — abundance waits in readiness. King Tai served as patriarch, King Ji practiced filial devotion and fraternal love, and Kings Wen and Wu brought sage wisdom and benevolent rule. The Duke of Zhou elevated four neighboring states, spreading fortune thick and deep. This verse traces the Zhou royal lineage across four generations: from Taiwang (King Tai, the Great King) through Wang Ji, to Wen and Wu, culminating in the Duke of Zhou's consolidation. Revolution here is not violent overthrow but generational cultivation. From Revolution to Waiting, the transformation shows that the greatest changes unfold over lifetimes, patient as clouds forming before rain.
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