Learning from the past is useful. Dwelling on the past is destructive.
We’ve all sinned. We must learn from our past mistakes, and then move on. Accept your failures and learn from them, then move on to make yourself better.
“Forget the former things; do not dwell on the past. See, I am doing a new thing! Now it springs up; do you not perceive it? I am making a way in the desert and streams in the wasteland.