Grace provides justification for sins. (3:21 – 5:21)
- Grace as justification for sin is by faith in Jesus Christ (3:21-31)
 - Grace has now been fully revealed to us through Jesus Christ. (3:21-23)
 - Sinners are justified by the blood of Jesus Christ (3:24-26)
 - Sinners are justified apart from works of the Law (3:27-28)
 - Grace is available to all people (3:29-30)
 - Law is upheld by the proper working of grace (3:31)
 
If you look carefully at these points, you easily see that Paul has made an interesting argument that grace provides us justification for our sins by faith in Jesus Christ.