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Hexagram 18

Work on the Decayed (Gǔ)

Upper Trigram Gen (Mountain) · Lower Trigram Xun (Wind)

Judgment

蛊:元亨,利涉大川。先甲三日,后甲三日。

Plain MeaningRepairing decay brings great success; plan three days before the start and consolidate three days after.

Image (Great Commentary)

山下有风,蛊;君子以振民育德。

Line Texts

  • 初六干父之蛊,有子,考无咎,厉终吉。

    Correcting the father’s decay—the worthy child clears the blame; danger, yet fortune in the end.

  • 九二干母之蛊,不可贞。

    Correcting the mother’s decay—do not be too rigid.

  • 九三干父之蛊,小有悔,无大咎。

    Correcting vigorously—slight regret, no great blame.

  • 六四裕父之蛊,往见吝。

    Indulging the decay—going on brings humiliation.

  • 六五干父之蛊,用誉。

    Correcting the decay with virtue—praise is won.

  • 上九不事王侯,高尚其事。

    Serving no king or lord, holding one’s own work in high honor.

Symbolism

Wind at the mountain’s foot stirring what has spoiled: reform and renewal.

Life Lesson

Face what has decayed head-on; plan before acting and follow through.

Modern Application

A time to fix legacy problems and reform what has stagnated.

Words of Caution

Tolerating decay only deepens it.

The opposite hexagram flips every line, the reverse turns it upside down, and the nuclear hides in the inner lines — read them side by side for a fuller picture.