Forgiven -- Forgotten
Saul was murdering Christians, yet God reached down in grace, saved his soul, transformed his life, renamed him Paul, and used him to change the world.
Your past is no obstacle to your future in the hands of The Lord. Regardless of what you've done, Jesus will save you. He will wash your past sins away and never remember them again. You get a brand new start. The Bible calls this the "new birth".
John 3:3 Jesus answered and said unto him, Verily, verily I say unto thee, Except a man be born again, he cannot see the kingdom of God.
I'm glad God doesn't hold forgiven sins against us. Like the Apostle Paul, He can use us in a mighty way if we let him.
Isaiah 38:17 Behold, for peace I had great bitterness: but thou hast in love to my soul delivered it from the pit of corruption: for thou hast cast all my sins behind thy back.