But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If you, being a Jew, live after the manner of Gentiles, and not as do the Jews, why compel you the Gentiles to live as do the Jews?
All Commentaries on Galatians 2:14 Go To Galatians 2
Augustine of Hippo
AD 430
So that one might fulfill the works of the law, his infirmity being assisted not by his own merit but by the grace of God, they were not to demand from the Gentiles a fleshly observation of the law but were to understand that through the same grace of God they were able to fulfill the spiritual works of the law.