Hexagram 18: Work on What Has Been Spoiled (Decay) (蠱 Gǔ) — I Ching Guide

Q: What is I Ching Hexagram 18 (蠱 Work on What Has Been Spoiled (Decay))?

I Ching Hexagram 18, 蠱 (Gǔ), represents Work on What Has Been Spoiled (Decay). It is formed by Mountain (艮 Gèn) above, Wind (巽 Xùn) below. The core teaching of this hexagram is captured in its Judgment: 'Work on What Has Been Spoiled has supreme success. It furthers one to cross the great water. Before the starting point, three days. After the starting point, three days....'

Q: What does the Image of Hexagram 18 mean?

The Image states: 'The wind blows low on the mountain: the image of Decay. Thus the superior man stirs up the people and strengthens their spirit.' This teaches that the superior person responds to the hexagram's situation by cultivating the corresponding inner quality.

Q: How do the six lines of Hexagram 18 develop its meaning?

The six lines trace a progression through the hexagram's situation. Starting from the bottom (Line 1) through Line 6, each position reveals a different aspect of how Work on What Has Been Spoiled (Decay) manifests — from initial stirrings to the final outcome. Key lines include the ruler of the hexagram and the culminating line.

Q: What is the relationship between Hexagram 18 and other hexagrams?

Hexagram 18 (Work on What Has Been Spoiled (Decay)) follows Hexagram 17 in the traditional King Wen sequence, forming a meaningful progression. Its nuclear hexagram and opposite/complementary hexagram provide additional dimensions of meaning.

Oriens

蠱

Gǔ — Hexagram 18

Work on What Has Been Spoiled (Decay)

Mountain (艮 Gèn) above, Wind (巽 Xùn) below

Published July 22, 2026 · By Oriens

Summary

I Ching Hexagram 18, 蠱 (Gǔ), represents Work on What Has Been Spoiled (Decay). Formed by Mountain (艮 Gèn) above, Wind (巽 Xùn) below, this hexagram teaches about work on what has been spoiled (decay). The core message: Work on What Has Been Spoiled has supreme success. It furthers one to cross the great water. Before the starting point, three days. After the starting point, three days..

Key Takeaways

Hexagram 18 is formed by Mountain (艮 Gèn) above, Wind (巽 Xùn) below, combining two of the eight trigrams into a unique archetypal situation
The Judgment reveals the hexagram's core teaching through a concise, oracular statement
The six lines trace a progression from initial conditions through to the culmination and outcome
The Image connects the natural symbolism of the trigrams to the conduct of the superior person
This hexagram's wisdom applies to modern situations involving

The Judgment

Work on What Has Been Spoiled has supreme success. It furthers one to cross the great water. Before the starting point, three days. After the starting point, three days.

— I Ching, Work on What Has Been Spoiled (Decay)

The Image

The wind blows low on the mountain: the image of Decay. Thus the superior man stirs up the people and strengthens their spirit.

— I Ching, Image

The Six Lines

Line 1: Line 1: Setting right what has been spoiled by the father. If there is a son, no blame rests upon the departed father. Danger. In the end good fortune.

Line 2: Line 2: Setting right what has been spoiled by the mother. One must not be too persevering.

Line 3: Line 3: Setting right what has been spoiled by the father. There will be a little remorse. No great blame.

Line 4: Line 4: Tolerating what has been spoiled by the father. In continuing one sees humiliation.

Line 5: Line 5: Setting right what has been spoiled by the father. One meets with praise.

Line 6: Line 6: He does not serve kings and princes; he sets himself higher goals.

Modern Application

Hexagram 18 is about inherited problems and the courage to correct them. The Chinese character Gu originally meant a poisoned pot or a decaying bowl — something that has been neglected and now requires cleaning. The hexagram uses the metaphor of correcting a father's or mother's mistakes to describe the responsibility each generation bears for fixing what it inherits. Three days of preparation before and after action emphasize the care required. In modern terms, Decay applies to organizational turnaround, family healing, rectifying systemic problems, and the difficult work of confronting and repairing inherited dysfunction.

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