John Chrysostom

"But he is a Jew which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter." By saying this he sets aside all things bodily. For the circumcision is outwardly, and the sabbaths and the sacrifices and purifications: all of which he hints in a single word, when he says, "For he is not a Jew which is one outwardly." But since much was made of the circumcision, inasmuch as even the sabbath gave way to it (John vii. 22), he has good reason for aiming more especially against it. But when he has said "in the spirit" he thereafter paves the way for the conversation of the Church, and introduces the faith. For it too is in the heart and spirit and hath its praise of God. And how cometh he not to show that the Gentile which doeth aright is not inferior to the Jew which doeth aright, but that the Gentile which doeth aright is better than the Jew which breaketh the Law? It was that he might make the victory an undoubted one. For when this is agreed upon, of necessity the circumcision of the flesh is set aside, and the need of a good life is everywhere demonstrated. For the Greek is saved without these, but the Jew with these is yet punished, Judaism stands by doing nothing. And by Greek he again means not the idolatrous Greek, but the religous and virtuous, and free from all legal observances.