Why is justification crucial for peace in a Christian's life?

The concept of justification is vital for a believer's peace because it signifies that through faith in Jesus Christ, every requirement of God is fully met. Ephesians 2:14 expresses that Christ Himself is our peace, which means that we no longer rely on our actions to earn favor with God. Knowing that 'it is finished' provides immense comfort, allowing Christians to find peace in their relationship with God. This peace, rooted in the finished work of Christ, helps believers to live without the burden of trying to attain righteousness through personal efforts but resting in the assurance that Christ’s righteousness is imputed to them.