Hexagram 31 咸 changing to hexagram 18 蠱
Changing lines (counted from the bottom): 2, 4, 5, 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 3
幹父之蠱，小有悔，无大咎。
The third line, undivided, shows (a son) dealing with the troubles caused by his father. There may be some small occasion for repentance, but there will not be any great error.
The two hexagrams
Hexagram 31 咸 — judgment
亨。利貞。取女吉。
Hsien indicates that, (on the fulfilment of the conditions implied in it), there will be free course and success. Its advantageousness will depend on the being firm and correct, (as) in marrying a young lady. There will be good fortune.
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 31
| Line | Chinese | Legge |
|---|---|---|
| 2 | 咸其腓，凶，居吉。 | The second line, divided, shows one moving the calves of his leg. There will be evil. If he abide (quiet in his place), there will be good fortune. |
| 4 | 貞吉悔亡，憧憧往來，朋從爾思。 | The fourth line, undivided, shows that firm correctness which will lead to good fortune, and prevent all occasion for repentance. If its subject be unsettled in his movements, (only) his friends will follow his purpose. |
| 5 | 咸其脢，无悔。 | The fifth line, undivided, shows one moving the flesh along the spine above the heart. There will be no occasion for repentance. |
| 6 | 咸其輔，頰，舌。 | The sixth line, divided, shows one moving his jaws and tongue. |
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.