Nourishment
頤 · Yí
貞吉。觀頤。自求口實。
山下有雷,頤。君子以慎言語,節飲食。
Correspondences
Yí (頤) — Nourishment
Before internal alchemy begins, the practitioner must build the foundation — regulate diet, sleep, breath, and desire. Hex 52 (Keeping Still) is the prerequisite posture: the mountain's stillness, the body quieted. Hex 27 (Nourishment) is the prerequisite discipline: what enters and what exits, the careful tending of the body as vessel. Both hexagrams share the mountain trigram (Gèn). The internal alchemist treats the body as the laboratory — and no experiment succeeds in a disordered laboratory.
Thunder (☳) — Arousing
One of the eight fundamental trigrams. Thunder (☳) represents Arousing — the shock of movement that initiates action. A single yang line erupts beneath two yin lines, the first son, the sudden awakening that sets things in motion.
Mountain (☶) — Keeping Still
One of the eight fundamental trigrams. Mountain (☶) represents Keeping Still — the power of stillness, meditation, and the boundary that defines. A yang line rests atop two yin lines, the third son, the gate between worlds.