Chapter 11 — Part I: The Creed — Article IX: The Holy Catholic Church; the Communion of Saints
Section 13. The Parts of the Church — These things having been explained, it will be necessary to enumerate the several component parts of the Church, and to point out their difference, in order that the faithful may the better comprehend the nature, properties, gifts, and graces of God's beloved Church, and by reason of them unceasingly praise the most holy name of God.