This is a cute saying but very true. One can't dwell on the past, everyone is human and can make mistakes. It takes a special and strong heart to accept that, and to Forgive and let go. But do it for your own sake too because it feels good to be happy!
Your greatest contribution to the kingdom of God may not be something you do but someone you raise - Andy Stanley I never forget how blessed I am to be raising kids that challenge my walk--they are a light to me.