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Hexagram 27
頤Yí
What a life takes in, gives out, and depends on for support.
Constancy is favorable. Observe nourishment; observe what one seeks to fill one's own mouth.
貞吉。觀頤，自求口實。
Thunder is below the mountain: Nourishment. The exemplary person is careful with words and sets measure in eating and drinking.
山下有雷，頤。君子以慎言語，節飲食。
Bottom to top
Line 1
舍爾靈龜，觀我朵頤，凶。
You leave your sacred tortoise and watch my moving jaws. Misfortune.
The bottom line leaves its own numinous tortoise to watch another mouth. When that firm base yields, lower Thunder becomes Earth and the figure is Hexagram 23, Mountain above Earth.
Read Line 1 in contextLine 2
顛頤，拂經，于丘頤，征凶。
Nourishment is reversed, contrary to the usual order. Seeking nourishment on the hill and advancing brings misfortune.
In the traditional reading, Line 2 first seeks nourishment from the firm line below, reversing the usual order, and then from the distant top line on the hill. Neither gives it a proper source of support. Changing Line 2 makes Lake below Mountain, Hexagram 41.
Read Line 2 in contextLine 3
拂頤，貞凶。十年勿用，无攸利。
Departing from nourishment: constancy brings misfortune. Do not act for ten years; nothing is beneficial.
At Line 3, the lower trigram closes on a course associated with misfortune in the text. Changing that line gives Fire below Mountain, Hexagram 22.
Read Line 3 in contextLine 4
顛頤，吉。虎視眈眈，其欲逐逐，无咎。
Nourishment is overturned, yet favorable. A tiger watches intently, its appetite pressing on. No fault.
The tiger's fixed gaze appears at Line 4, the base of outer Mountain. A firm line there makes Fire above Thunder and yields Hexagram 21, whose mouth image is directed at an obstruction.
Read Line 4 in contextLine 5
拂經，居貞吉，不可涉大川。
Departing from the regular course. Staying constant is favorable. Do not cross the great river.
Line 5 occupies the broken center of Mountain and depends on an irregular source of support. Its change makes that center firm, turns Mountain into Wind, and produces Hexagram 42 above the same inner Thunder.
Read Line 5 in contextLine 6
由頤，厲吉，利涉大川。
The source of nourishment. Danger, yet favorable. Crossing the great river is beneficial.
The top line stands at the source of nourishment. When it yields, upper Mountain becomes Earth and the result is Hexagram 24, one firm beginning beneath receptive ground.
Read Line 6 in contextOne line away
One classical protocol
A cast determines which part of a hexagram governs the reading. When one line moves, that line is read as the focus; other moving-line counts use different focus rules.
Read the changing-line protocol
Cast this properly