A religious phenomenon will only be recognized as such if it is grasped at its own level, that is to say, if it is studied as something religious. To try to grasp the essence of such phenomenon by means of physiology, psychology, sociology, economics, linguistics, art or any other study is false; it misses the one unique and irreducible element in it — the element of the sacred.

Patterns in Comparative Religion (1963), as translated by Rosemary Sheed, p. xiii