Tikkun Chatzot — the Midnight Vigilתיקון חצות

Rising at midnight to lament the exile of the Shekhinah (Tikkun Rachel: Lamentations, ashes, weeping) and then to study toward dawn (Tikkun Leah) — the Zohar's image of the Holy One entering the Garden at midnight to hear the songs of souls, institutionalized in Safed into a nightly liturgy. David's self-playing midnight harp is its emblem. Grief practiced on a schedule, so it stays living instead of leaking.