How can a believer know they are justified before God?

Believers can know they are justified before God through the faith they place in Jesus Christ. Justification is not based on personal merit but is firmly rooted in the redemptive work of Christ, as articulated in Romans 5:1—'being justified by faith, we have peace with God through our Lord Jesus Christ.' This means that God credits the righteousness of Christ to our account, enabling us to stand before Him as justified individuals. It is this assurance that empowers believers to live for God, secure in their saved state, knowing that they cannot earn justification through works, as it is a gift of grace.