Galatians 2:16 and yet because we know that a person is not justified by the works of the law but by faith in Jesus Christ, even we ourselves have believed in Christ Jesus. This was so that we might be justified by faith in Christ and not by the works of the law, because by the works of the law no human being will be justified.
What is it to be Justified?
A thing pronounced by God to be just, the right; or the restoration of a criminal, a fresh chance given him. Is a typical definition.
However, it is much more much richer and deeper.