Chapter 8 — Part I: The Creed — Article VI: He Ascended into Heaven, Sitteth at the Right Hand of God, the Father Almighty
Section 11. Greatness Of This Mystery — In this exposition he should observe, in the first place, that all other mysteries refer to the Ascension as to their end and find in it their perfection and completion; for as all the mysteries of religion commence with the Incarnation of our Lord, so His sojourn on earth terminates with His Ascension.