David’s prayer is our model. “Search me, O God, and know my heart; test me and know my anxious thoughts. See if there is any offensive way in me, and lead me in the way everlasting” (Ps. 139:23–24). God knows us. We flatter and justify ourselves and march blindly toward the brink of disaster; but God in His mercy brings the light of truth to jolt us to our senses.