Romans 3:19-20, 27-28

Obviously, the law applies to those to whom it was given, for its purpose is to keep people from having excuses, and to show that the entire world is guilty before God. For no one can ever be made right with God by doing what the law commands. The law simply shows us how sinful we are.

Can we boast, then, that we have done anything to be accepted by God? No, because our acquittal is not based on obeying the law. It is based on faith. So we are made right with God through faith and not by obeying the law.