How do we know that Jesus Christ is our righteousness?

The doctrine of Christ’s righteousness is grounded in His atoning work on the cross. Scripture tells us that He who knew no sin became sin for us, that we might be made the righteousness of God in Him (2 Corinthians 5:21). This means that through Christ's sacrificial death, He fully met the demands of the law and bore the penalty for our transgressions. As a result, believers are declared righteous before God not because of their own works, but solely through faith in Christ's finished work. This is central to the gospel message and emphasizes that Christ is all we need for justification.