Hexagram 21: Biting Through Changing to Hexagram 42: Increase

I Ching casting meaning · Shi He → Yi

Good news with teeth: the obstruction cleared, and the current turns generous. Increase is wind and thunder multiplying each other — the decisive move you made unlocked flow that had been dammed up behind it, and now resources, goodwill, and momentum arrive faster than expected. The catch is direction. Increase amplifies whatever it touches, so aim it: pour the surplus into the thing the blockage was stopping you from building, not into celebration. Practical version: within days, assign the freed time and energy a specific job. Growth this clean doesn't linger waiting for a decision — it either gets invested or evaporates into noise.

A casting that moves from Biting Through into Increase means the situation you asked about is not static — it begins as one pattern and resolves into another. The first hexagram describes where you stand; the second describes where events are carrying you.

Highlighted in red: lines 4 and 5 are moving — counted from the bottom. A moving line is where the change is actually happening: it flips from yang to yin or back, and that flip is what turns Biting Through into Increase.

The situation: Hexagram 21, Biting Through

An obstruction must be bitten through. Decide and enforce.

Something hard is stuck between the teeth of the situation, and it will not dissolve on its own. This is the decisive-enforcement hexagram: the obstacle is specific, real, and removable only by direct, deliberate action. The unpaid invoice, the violated boundary, the broken rule everyone works around — name it, address it, and apply consequences cleanly. Not cruelly: precision beats force here. Hesitation lets the problem calcify; clarity is the kind version of this conversation. Bite through once, firmly, and the whole mechanism starts working again. Chewing forever is the failure mode.

Structurally, Biting Through is Thunder below Fire — the inner state meeting the outer condition. That pairing is the lens for everything above.

Where it's heading: Hexagram 42, Increase

True increase. Wind and thunder multiply each other.

The changed hexagram is the trajectory, not a verdict. As the moving lines settle, the energy of Biting Through gives way to Increase (Yi) — Thunder below Wind. The advice that belongs to this outcome: Use the surplus boldly: invest in what matters and fix one fault fast.