When a believer sins, he should acknowledge the mistake, ask God's forgiveness, pray to do better, and move on rather than letting regret linger.“This is why God teaches us that when a believer wrongs his/her soul, it is important to acknowledge the mistake, ask God for forgiveness, pray to do better next time, and then move on.”“There is no point of fretting over the sin and letting the feeling of negative-regrets linger for a long time.”“never despair of GOD’s mercy. For GOD forgives all sins. He is the Forgiver, Most Merciful.”“If they fall in sin or wrong their souls, they remember GOD and ask forgiveness for their sins - and who forgives the sins except GOD - and they do not persist in sins, knowingly.”