Be gracious to me, O God, according to Thy lovingkindness; according to the greatness of Thy compassion blot out transgressions. Wash me thoroughly from my iniquity, and cleanse me from my sin. For I know my transgressions, and my sin is ever before me. Against Thee, Thee only, I have sinned, and done what is evil in Thy sight, so that Thou are justified when Thou dost speak, and blameless when Thou dost judge. . . . Create in me a clean heart, O God, and renew a steadfast spirit within me. Psalm 51:1–4,10