In the Hall of Ma'at, Anubis weighs the dead person's heart against the feather of truth. If the heart is heavier — burdened with wrongdoing — Ammit devours it. If it balances, the soul enters the Field of Reeds. Hex 21 (Biting Through) is the judicial function: thunder and lightning, the court that determines guilt. But Hex 15 (Modesty) is the heart that passes the test — the mountain hidden within the earth, power that does not announce itself. The Egyptian afterlife judgment and the I-Ching's most favorable hexagram share this insight: the test is not of what you did but of what you carry. A light heart passes. The I-Ching's Hex 15 is the lightest heart in the sequence — every line favorable, no excess, nothing to weigh against the feather.