Hexagram 18 — 蛊 (Gǔ), Work on the Decayed
Above: ☶ 艮 Mountain Below: ☴ 巽 Wind
The Judgment
元亨，利涉大川。先甲三日，后甲三日。
Corruption has crept in — success comes from deliberate repair: plan before, verify after.
The Image (Daxiang)
「山下有风，蛊；君子以振民育德。」Wind below the mountain — the noble person rouses the people and nurtures virtue.—— 《周易·大象传》（The Image Commentary）
The Tuan Commentary
彖曰：蛊，刚上而柔下，巽而止，蛊。蛊，元亨，而天下治也。利涉大川，往有事也。先甲三日，后甲三日，终则有始，天行也。——《易传·彖传》
The Six Line Texts
| 初六 | 干父之蛊，有子，考无咎，厉终吉。 |
| 九二 | 干母之蛊，不可贞。 |
| 九三 | 干父之蛊，小有悔，无大咎。 |
| 六四 | 裕父之蛊，往见吝。 |
| 六五 | 干父之蛊，用誉。 |
| 上九 | 不事王侯，高尚其事。 |
In Plain Terms
Something is rotting — clean it up deliberately. When you receive this hexagram, hold the judgment beside your question: it describes a posture and a season, not a script.
I Ching judgments quoted from the Zhouyi (public domain); modern renderings by BaziOracle, for cultural and entertainment reference.