How do we know the concept of justification is true?

The doctrine of justification asserts that believers are declared righteous before God not based on their own works, but through faith in Jesus Christ who fulfilled the law perfectly. Romans 5:1 states, 'Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ.' This peace is a direct result of Christ's redemptive work, where He bore our sins and provided a way for us to be seen as righteous.

Further, 2 Corinthians 5:21 explains this divine transaction: 'For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.' This highlights how our justification is contingent upon Christ bearing our sin. Therefore, justification is not an arbitrary declaration but is deeply rooted in the justice of God, providing a true means of reconciling us with Him.