Faith in Christ is sufficient for salvation because Christ’s atoning work is sufficient. For we confess that we cannot be justified before God by our own strength, merits, or works but are freely justified for Christ’s sake through faith when we believe that we are received into God’s favor and that our sins are forgiven on account of Christ, who by His death made satisfaction for our sins. This faith God reckons to us as righteousness. Thus we receive the righteousness of Christ are seen as righteous in God’s sight by faith, by trust in Christ’s atoning work. We are saved and forgiven on account of Christ and we receive this by faith alone.