The Letters to the Galatians and Ephesians

The Letter to the Galatians proclaims that Christiantiy was dependent upon nothing but God's free gift of grace, bestowed on all who would accept that gift by faith, Gentile and Jew alike. Because it declares this universality and confutes the Judaizing Christians, the letter is one of the great theological cornerstones of Christianity, according to Dr. Barclay.