" This consists in a peculiar feeling, which never leaves him personally, which he finds shared by many others, and which he may suppose millions more also experience. It is a feeling which he would like to call a sensation of eternity, a feeling as of something limitless, unbounded, something “oceanic.“ It is, he says, a purely subjective experience, not an article of belief; it implies no assurance of personal immortality, but it is the source of the religious spirit and is taken hold off by the various Churches and religious systems, directed by them into definite channels, and also, no doubt, used up in them. One may rightly call oneself religious on the ground of this oceanic feeling alone, even though one reject all beliefs and all illusions. "

― Sigmund Freud , Civilization and Its Discontents