颐。贞吉。观颐，自求口实。
Mountain over Thunder. The open mouth. What goes in and what comes out.
The Lines
初九：舍尔灵龟，观我朵颐，凶。
Line 1 — You let your magic tortoise go. You had your own wisdom and abandoned it to envy what others have.
六二：颠颐，拂经，于丘颐，征凶。
Line 2 — Turning to the summit for nourishment. Seeking sustenance from the wrong source.
六三：拂颐，贞凶，十年勿用，无攸利。
Line 3 — Turning away from nourishment. Rejecting genuine nourishment. Ten years of this and nothing grows.
六四：颠颐，吉。虎视眈眈，其欲逐逐，无咎。
Line 4 — Spying about with sharp eyes like a tiger. The hungry leader seeking resources for others.
六五：拂经，居贞吉，不可涉大川。
Line 5 — Turning away from the path. Unconventional nourishment. Don't take on major challenges until the new source is established.
上九：由颐，厉吉，利涉大川。
Line 6 — The source of nourishment. You are the source others feed from. Carry it with awareness.
Nuclear Hexagram
Nuclear Hexagram: 2 坤 (Earth)
Inside nourishment is the ground that grows everything.
Practical Application
Examine the input. Everything downstream depends on it.