Chapter 11 — Part I: The Creed — Article IX: The Holy Catholic Church; the Communion of Saints
Section 2. First, as St. Augustine observes, the Prophets spoke more plainly and openly of the Church than of Christ, foreseeing that on this a much greater number may err and be deceived than on the mystery of the Incarnation. For in after ages there would not be wanting wicked men who, like the ape that would fain pass for a man, would claim that they alone were Catholics, and with no less impiety than effrontery assert that with them alone is the Catholic Church.