BROTHERS and SISTERS, knowing that a person is not justified by the works of the Law, but through the faithfulness of Jesus Christ, we have come to believe in Christ Jesus, so that we might be justified by faith in Christ, and not by the works of the Law. Because no one will be justified by the works of the Law. But if, in our effort to be justified in Christ, we were found to be sinners, is Christ then a servant of sin? Certainly not! But if I build up again the very things that I once destroyed, then I make myself a transgressor of the Law. For through the Law I died to the Law, so that I might live to God. I have been crucified with Christ, and it is no longer I who live, but Christ Who lives in me. And the life I now live in the flesh, I live by faith of the Son of God, Who loved me and gave up Himself for me.
Blessed Theophylact of Ochrid and Bulgaria:
See how carefully Paul expresses his thought, "We have abandoned the Law, not because it was evil, but because it was weak and unable to make us righteous." No one could carry out the works required by the Law. They were burdensome and difficult to fulfill, not because of their magnitude, but because of the minutiae. Furthermore, the purpose of the Law was to cleanse the pollutions of the body, not to sanctify the soul.