The Bible says, “Jesus is our peace” which reminds us that we were once enemies of God (Romans 5:10), we were at “enmity” with God. It started back in the Garden of Eden when Adam and Eve sinned—mankind was separated from God.
When we put our faith in the finished work of the Cross, this enmity ends; hence, we now have peace with God. We were separated from God, but are now unified with God in Christ who “has broken down the middle wall of separation.”
Without Jesus Christ, the Prince of Peace (John 1:17), we would never have grace and peace.