Tractates on the Gospel of John

⁸ Let us rejoice, then, and give thanks that we are made not only Christians, but Christ. Do ye understand, brethren, and apprehend the grace of God upon us? Marvel, be glad, we are made Christ. For if He is the head, we are the members: the whole man is He and we. This is what the Apostle Paul says: “That we be no longer babes, tossed to and fro, and carried about with every wind of doctrine.” But above he had said, “Until we all come together into the unity of faith, and to the knowledge of the Son of God, to the perfect man, to the measure of the age of the fullness of Christ.” The fullness of Christ, then, is head and members. Head and members, what is that? Christ and the Church. We should indeed be arrogating this to ourselves proudly, if He did not Himself deign to promise it, who says by the same apostle, “But you are the body of Christ, and members.”