Lake over fire: water and fire clash; change is inevitable. Revolution.
Judgment
革：己日乃孚，元亨，利貞，悔亡。
Revolution: on your own day you are believed. Supreme success; perseverance furthers. Remorse disappears. Change when the time is ripe.
Line texts
初九：鞏用黃牛之革。 Wrapped in the hide of a yellow cow. Not yet time to act.
六二：己日乃革之，征吉，無咎。 When one's own day comes, one may create revolution. Starting brings good fortune; no blame.
九三：征凶，貞厲，革言三就，有孚。 Starting brings misfortune; perseverance brings danger. When talk of revolution has gone the rounds three times, one may commit oneself, and men will believe.
九四：悔亡，有孚改命，吉。 Remorse disappears. Men believe him. Changing the form of government brings good fortune.
九五：大人虎變，未占有孚。 The great man changes like a tiger. Even before he questions the oracle he is believed.
上六：君子豹變，小人革面，征凶，居貞吉。 The noble one changes like a panther; the petty man changes his face. Starting brings misfortune; remaining persevering brings luck. After change, settle.