God, as Descartes justly said, we know! but what is man? The schools answered:— Man is a rational animal! So was apparently a dog, or a bee, or a beaver, none of which seemed to need churches. Modern science, with infinite effort, has discovered and announced that man is a bewildering complex of energies, which helps little to explain his relations with the ultimate Substance or Energy or Prime Motor whose existence both Science and Schoolmen admit; which Science studies in laboratories and Religion worships in churches. The Man whom God created to fill his Church, must be an energy independent of God; otherwise God filled his own Church with his own energy.

Mont Saint Michel and Chartres (1904)