What does Psalm 90:8 mean?

Moses makes the crucial point that God sees everything about us, including our sin. Even our so-called secrets are known to Him. Nothing is hidden from His all-seeing eyes. Hebrews 4:13 acknowledges that "no creature is hidden from his sight, but all are naked and exposed to the eyes of him to whom we must give account."

King David tried to cover up his sins of adultery and murder, but he could not hide his sins from God. He saw David's wickedness and sent Nathan the prophet to confront David. "You are the man!" Nathan said, as he exposed David's sin (2 Samuel 12:7). Later, David confessed his sins and received forgiveness. He wrote in Psalm 32:5: "I acknowledged my sin to you, and I did not cover my iniquity." Because God sees every sin we commit, it is unwise to try to cover our sins. It is better to follow David's example and confess our sins to the Lord and seek His forgiveness.