Note 76 — Chapter IV · Notre Dame of Paris and Other Churches of the Capital[71]

In his Summa totius theologiæ St. Thomas held that the existence of God was to be known by reason. He took his stand on a palpable fact—the existence of creatures. He began with the fecund idea of motion, the stars in their orbits, man engendering man. If there is movement there must be a First Motor. If there ever had been an instant when nothing was, nothing ever would have been. Effects must have a cause. Either nothing is, which is an absurdity, or there must be One Being eternally immutable.

That the movement is ordered, such as night and day, season following season, shows a supreme power directing. That creatures are more or less perfect supposes a perfect being. One by one Aquinas laid his foundation stones till a solid lower wall was built, on which he reared his majestic structure. In the Roman Breviary, he is thus recorded: “Thou hast written well of me, Thomas, what recompense do you ask of me?” “None but yourself, Lord!” (“Non aliam, Domine, nisi te ipsum!”).