Hexagram 18: Work on the Decayed

Trigrams

Upper trigram: Gen (Mountain) · Lower trigram: Xun (Wind)

Judgment

Sublime success, favorable to cross the great river. Consider carefully three days before and three days after the starting point.

Image

Wind beneath the mountain: work on the decayed. The noble one stirs the people and nurtures their virtue.

Meaning of Hexagram Work on the Decayed

Work on the Decayed (蠱) is hexagram #18 of the 64 I-Ching hexagrams, formed by the upper trigram Gen (Mountain) and lower trigram Xun (Wind). It represents repairing what has fallen into corruption or neglect requires resolute effort. When this hexagram is cast, the querent should meditate on the judgment and image to grasp what the Yi is saying about the current situation.

The Six Lines Explained

First Line (Six at the Beginning)

"Gan fu zhi gu, you zi, kao wu jiu, li, zhong ji — Setting right the father's decay; thanks to the son, the father is faultless; danger, but good fortune in the end"

Repairing the father's ruin; thanks to a son, the father commits no fault; though there is some danger requiring caution, it ends well. The opening line on correcting old mistakes — one must be careful but should not evade responsibility.

Second Line (Nine in the Second Place)

"Gan mu zhi gu, bu ke zhen — Setting right the mother's decay; one must not be too rigid"

Repairing the mother's ruin — one should not be too stubborn or rigid. Advice on flexibility when handling delicate matters, avoiding unnecessary conflict.

Third Line (Nine in the Third Place)

"Gan fu zhi gu, xiao you hui, wu da jiu — Setting right the father's decay; slight remorse, but no great fault"

Repairing the father's ruin, with a little regret but no great fault. This line is overly firm and hasty in the repair, but fundamentally on the right track.

Fourth Line (Six in the Fourth Place)

"Yu fu zhi gu, wang jian lin — Tolerating the father's decay; going on brings humiliation"

Lacking resolve, one lets the father's ruin drag on; continuing this way will bring regret. A warning against delay and indecision in correcting mistakes, since letting a bad situation persist brings worse consequences.

Fifth Line (Six in the Fifth Place)

"Gan fu zhi gu, yong yu — Setting right the father's decay; one gains praise"

Repairing the father's ruin and earning praise for it. Placed high, this line completes the repair with the support of a capable helper (line 2), achieving success and good reputation.

Top Line (Nine at the Top)

"Bu shi wang hou, gao shang qi shi — Not serving kings or princes, holding one's own affairs in high honor"

Not currying favor with kings or lords, but keeping one's own noble integrity. The final line, entirely different — it does not speak of repair but praises a person of high character living beyond fame and profit, a model for others.

The Transformed Hexagram

The inner trigram is Xun (Wind), the outer is Gen (Mountain) — the inverted form of hexagram 17, Following. Identify the exact moving line for the correct transformation.

Applications by Area of Life

Work & Career

This hexagram concerns repairing and reforming problems and decay left from the past. Act decisively but with a plan (as advised by “considering before and after” in the Tuan Commentary), avoiding delay (as warned in line 4).

Love & Relationships

There may be a need to resolve long-standing issues or misunderstandings in the relationship. Act with gentleness (as in line 2) rather than excessive rigidity, to avoid unnecessary hurt.

Health

The image of “decay needing repair” may relate to correcting long-standing bad habits affecting health. Act promptly, without delay.

Wealth

There may be a need to deal with lingering financial issues, debts, or past investment mistakes. Resolve them decisively with a clear plan rather than letting them drag on.

Frequently Asked Questions about Work on the Decayed

What does hexagram Gu (Decay) mean?

Gu has two meanings: decay/ruin and work/task. This hexagram speaks of repairing past ruin and mistakes — what has decayed must be redone, and that is the essential task at hand.

Why is hexagram Gu (decay, seemingly negative) judged favorably in the Tuan Commentary?

Because the hexagram does not praise decay itself, but the act of repairing and renewing — “nothing declines to its utmost without rising again”; decay is precisely the opportunity for renewal.

Why does the final line not speak of “repair” like the other lines?

This is the special feature of this hexagram — after the repair is complete (lines 1 through 5), the top line shifts to praising a person of noble integrity, unconcerned with fame and profit, as an ideal to aspire to once things are settled.