In vv. 20-28 David considered his righteousness, perfection, faithfulness, cleanness, and purity as the cause of God’s saving him, and he considered God’s salvation a recompense to him. This is a wrong concept. God saves us not because of our righteousness but because of His mercy and His compassion (Lam. 3:22; Eph. 2:1-9; Titus 3:5) and because of His own purpose (2 Tim. 1:9).