革 → 渙
第49卦 革 (Revolution) 变 第59卦 渙 (Dispersion)
变爻
此变化涉及 5 个变爻（第 1、2、3、4、6 爻）。
第初爻
初九 鞏用黃牛之革。
Nine at the beginning means: Wrapped in the hide of a yellow cow.
第二爻
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.
第三爻
九三 征凶貞厲。革言三就。有孚。
Nine in the third place means: Starting brings misfortune. Perseverance brings danger. When talk of revolution has gone the rounds three times, One may commit himself, And men will believe him.
第四爻
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.
第上爻
上六 君子豹變。小人革面。征凶。居貞吉。
Six at the top means: The superior man changes like a panther. The inferior man molts in the face. Starting brings misfortune. To remain persevering brings good fortune.
卦象变化
焦氏易林
羽翮病傷，无以為強。宋公德薄，敗於水泓。
Wings and pinions sick and wounded, unable to summon strength. Duke Song, thin in virtue, was defeated at the waters of Hong.
— 焦延寿《焦氏易林》，公元前一世纪
注释
澤中有火，革之象也。羽翮病傷，無以為強。宋公德薄，敗於水泓。風行水上，渙之象也。前638年宋襄公率軍抗楚於泓水。臣下勸趁楚軍渡河未濟而擊，襄公以仁義為由拒絕，堅待楚軍列陣整齊方戰。結果大敗，身受重傷，翌年而亡。「宋襄之仁」遂成迂腐之代名詞。從革至渙，錯置之原則瓦解軍事凝聚力——宋公之僵化仁義如風行水上，將自家軍陣吹散。革命之際若以迂闊之理念代替時機之判斷，則己身先渙。
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