Hexagram 16 豫 changing to hexagram 18 蠱
Changing lines (counted from the bottom): 2, 3, 4, 6.
What to read
Four changing lines: read the two unchanged lines of the resulting hexagram; the lower one is the main one. (Rule set out by Zhu Xi in the Yixue qimeng.)
Hexagram 18 蠱, line 1
幹父之蠱，有子考，无咎，厲終吉。
The first line, divided, shows (a son) dealing with the troubles caused by his father. If he be an (able) son, the father will escape the blame of having erred. The position is perilous, but there will be good fortune in the end.
Hexagram 18 蠱, line 5
幹父之蠱，用譽。
The fifth line, divided, shows (a son) dealing with the troubles caused by his father. He obtains the praise of using (the fit instrument for his work).
The two hexagrams
Hexagram 16 豫 — judgment
利建侯行師。
Yü indicates that, (in the state which it implies), feudal princes may be set up, and the hosts put in motion, with advantage.
Hexagram 18 蠱 — judgment
元亨。利涉大川。先甲三日，後甲三日。
Kû indicates great progress and success (to him who deals properly with the condition represented by it). There will be advantage in (efforts like that of) crossing the great stream. (He should weigh well, however, the events of) three days before the turning point, and those (to be done) three days after it.
The changing lines of hexagram 16
| Line | Chinese | Legge |
|---|---|---|
| 2 | 介于石，不終日，貞吉。 | The second line, divided, shows one who is firm as a rock. (He sees a thing) without waiting till it has come to pass; with his firm correctness there will be good fortune. |
| 3 | 盱豫，悔。遲有悔。 | The third line, divided, shows one looking up (for favours), while he indulges the feeling of pleasure and satisfaction. If he would understand!—If he be late in doing so, there will indeed be occasion for repentance. |
| 4 | 由豫，大有得。勿疑。朋盍戠。 | The fourth line, undivided, shows him from whom the harmony and satisfaction come. Great is the success which he obtains. Let him not allow suspicions to enter his mind, and thus friends will gather around him. |
| 6 | 冥豫，成有渝，无咎。 | The topmost line, divided, shows its subject with darkened mind devoted to the pleasure and satisfaction (of the time); but if he change his course even when (it may be considered as) completed, there will be no error. |
English: James Legge (1882), public domain. Chinese: Zhou Yi.
Data: English Wikisource (Public domain texts; transcription CC BY-SA 4.0); Chinese Wikisource (Public domain texts; transcription CC BY-SA 4.0). Retrieved 2026-10-22.