I Ching
Interpreted by wu wei

Nucular Trigrams

Within each kua there are two nuclear trigrams. They are called nuclear trigrams because they are made up of the middle four lines of the kua: lines 2, 3, 4, and 5. The nuclear trigrams influence the meaning of the individual lines more than they influence the overall meaning of the kua. The lower nuclear trigram is formed from lines 2, 3, and 4; the upper nuclear trigram is formed from lines 3, 4, and 5. The bottom and top lines of the kua, lines 1 and 6, are not affected by the nuclear trigrams because they are not part of either of them.

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_____ Nucluar group beginning

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_____Nucular group end

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Line 2 of the kua is part of two trigrams: the lower primary trigram, of which it is the center line, and the lower nuclear trigram, of which it is the bottom line.

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_____Lower primary trigram begin

_____Lower nuclear trigram begin

_____Lower primary trigram end

_____Lower nuclear trigram end

Line 3 is part of three trigrams: the lower primary trigram, of which it is the top line, the lower nuclear trigram, of which it is the center line, and the upper nuclear trigram, of which it is the bottom line.

_____Lower primary trigram begin

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_____Lower primary trigram end/ Lower nuclear trigram begin

_____Upper nuclear trigram begin

_____ Lower nucler trigram end

_____Upper nuclear trigram end

Line 4 is also part of three trigrams: the lower nuclear trigram, of which it is the top line, the upper nuclear trigram, of which it is the middle line, and the upper primary trigram, of which it is the bottom line.

_____Lower nuclear trigram begin

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_____Lower nuclear trigram end/ Upper nuclear trigram begin

_____Upper primary trigram end

_____Upper nuclear trigram end

_____Upper primary trigram begin

Line 5 of the kua, like line 2, is part of two trigrams: the upper nuclear trigram, of which it forms the top line, and the upper primary trigram, of which it forms the middle line.
If a particular line has meaning for you, that is, it is a moving line, and the line is either number 2, 3, 4, or 5 of the kua, then the line will be subtly influenced by the nuclear trigram or trigrams of which it is a part. What the specific influence is will be determined by the nature of the nuclear trigram itself. For instance, if the nuclear trigram is danger, there will be a hint of danger in the situation, and the counsel of the moving line may add a word of caution.

_____Upper nuclear trigram begin

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_____Upper nuclear trigram end/ Upper primary trigram begin

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_____Upper primary trigram end

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