Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. - Romans 5:1
When you came to Christ, your sin was justified. A preacher friend used to say “justified means just-as-if-I’d never sinned.” Now you have peace with God. That peace flows over into every area of your life. In John 14:27, Jesus promised His supernatural peace to those who followed Him. You have peace with your past because Jesus had forgiven your sin. You have peace with your failures because God doesn’t hold your sin against you.