How do we know the righteousness of Christ is sufficient for our salvation?

The sufficiency of Christ's righteousness is a fundamental tenet of the gospel. Isaiah emphasizes that it is through Christ's work that we are reconciled to God, as He bore our iniquities and fulfilled all the righteousness required by God's law. In returning to and resting in Christ, we acknowledge that no effort on our part can add to His complete work. This doctrine is echoed throughout Scripture, ensuring that our standing before God is based solely on what Christ has accomplished on our behalf, affirming that our acceptance and hope rest firmly in Him and not in ourselves.