"Where is my faith? Even deep down … there is nothing but emptiness and darkness … If there be God—please forgive me. When I try to raise my thoughts to Heaven, there is such convicting emptiness that those very thoughts return like sharp knives and hurt my very soul … How painful is this unknown pain—I have no Faith. Repulsed, empty, no faith, no love, no zeal, … What do I labor for? If there be no God, there can be no soul. If there be no soul then, Jesus, You also are not true."
Mother Teresa, Letters. Teresa, Mother; Kolodiejchuk, Brian (2007). Mother Teresa: Come Be My Light. New York: Doubleday. ISBN 0385520379
"In dark ages people are best guided by religion, as in a pitch-black night a blind man is the best guide; he knows the roads and paths better than a man who can see. When daylight comes, however, it is foolish to use blind old men as guides."
Christopher Hitchens on How Religion Poisons Everything
"The argument with faith is the foundation and origin of all arguments, because it is the beginning — but not the end — of all arguments about philosophy, science, history, and human nature. It is also the beginning — but by no means the end — of all disputes about the good life and the just city. Religious faith is, precisely because we are still-evolving creatures, ineradicable. It will never die out, or at least not until we get over our fear of death, and of the dark and of the unknown, and of each other. For this reason, I would not prohibit it even if I thought I could. Very generous of me, you may say. But will the religious grant me the same indulgence? I ask because there is a real and serious difference between me and my religious friends, and the real and serious friends are sufficiently honest to admit it. I would be quite content to go to their children’s bar mitzvahs, to marvel at their Gothic cathedrals, to "respect" their belief that the Koran was dictated, though exclusively in Arabic, to an illiterate merchant, or to interest myself in Wicca and Hindu and Jain consolations. And as it happens, I will continue to do this without insisting on the polite reciprocal condition — which is that they in turn leave me alone. But this, religion is ultimately incapable of doing. As I write these words, and as you read them, people of faith are in their different ways planning your and my destruction, and the destruction of all the hard-won human attainments that I have touched upon. Religion poisons everything."