Before we got saved, we were enemies of God. It took the Blood of Christ to appease God's wrath for His Enemies. After we placed our trust in Christ's Death, Burial, & Resurrection, not only did we get access to the forgiveness of sins in Christ but we are also declared righteous. We are no longer God's enemies. God has reconciled us to Him. We have transformed from enemies to ambassadors whose ministry is the ministry of reconciliation. We only get Peace WITH God upon salvation. Peace OF God is a different thing. It is something that we need to let rule in our hearts.