Romans says believers have peace with God through Jesus Christ because they have been justified by faith. This peace is not merely a calm feeling; it is a reconciled standing before God grounded in Christ.
Romans 5 begins a new movement after Paul's explanation of justification. Because God has justified by faith, believers stand in grace and rejoice in hope of God's glory.
This gives assurance a firm foundation. Peace with God rests on what God has done through Christ, not on the changing strength of a reader's emotions.
should not flatten peace into only inner tranquility. Romans 5 includes that comfort, but the first emphasis is restored relationship with God.
Original wording based on Romans 5:1-2.