Catena Aurea on Matthew 16:13–19: Origen

He does not express what it is which they shall not prevail against, whether the rock on which He builds the Church, or the Church which He builds on the rock; but it is clear that neither against the rock nor against the Church will the gates of hell prevail.

Cyril [ed. note: ‘ This passage is quoted in the Catena from ‘Cyril in Lib. Thes.’ but does not occur in any of S. Cyril’s works. On the subject of this interpolation, vid. Launoy’s Epistles, part i. Ep. 1-3. and v. Ep. 9. c. 6-12. From him it appears that, besides the passage introduced into the Catena, S. Thomas ascribes similar ones to S. Cyril in his comment on the Sentences, Lib. iv. cl. 24. 3. and in his books ‘contr. impugn.reliq.’ and ‘contra errores Graee.’ He is apparently the first to cite them, and they seem to have been written later than Nicholas I. and Leo IX. (A. D. 867-1054.) He was young when he used them, and he is silent about them in his Summa, (which was the work of his last ten years,) in three or four places where the reference might have been expected.]

According to this promise of the Lord, the Apostolic Church of Peter remains pure and spotless from all leading into error, or heretical fraud, above all Heads and Bishops, and Primates of Churches and people, with its own Pontiffs, with most abundant faith, and the authority of Peter. And while other Churches have to blush for the error of some of their members, this reigns alone immoveably established, enforcing silence, and stopping the mouths of all heretics; and we [ed. note: The editions read here, ‘et nos necessario salutis,’ the meaning of which, says Nicolai, it is impossible to divine], not drunken with the wine of pride, confess together with it the type of truth, and of the holy apostolic tradition.