Romans 5:1

Therefore, since we have been justified (that is, acquitted of sin, declared blameless before God) by faith, (let us grasp the fact that) we have peace with God (and the joy of reconciliation with Him) through our Lord Jesus Christ. 

When we receive salvation, our standing with God changes. We are no longer in sin and opposition to God. We receive peace with God, are welcomed into His family, and are no longer under the condemnation of sin. We are loved and reconciled to God through our belief in Jesus Christ. We have peace with God!