Albert Einstein Quote
A human being is a part of the whole, called by us "Universe," a part limited in time and space. He experiences himself, his thoughts and feelings as something separate from the rest—a kind of optical delusion of his consciousness. The striving to free oneself from this delusion is the one issue of true religion. Not to nourish it but to try to overcome it is the way to reach the attainable measure of peace of mind.
Letter, February 12, 1950. As reported in: The New Quotable Einstein by Alice Calaprice (Princeton University Press, 2005: ISBN 0691120749), p. 206