“Where questions of religion are concerned, people are guilty of every possible sort of dishonesty and intellectual misdemeanor.”

“Where the questions of religion are concerned people are guilty of every possible kind of insincerity and intellectual misdemeanor.”

“Religion is a system of wishful illusions together with a disavowal of reality, such as we find nowhere else but in a state of blissful hallucinatory confusion. Religion's eleventh commandment is "Thou shalt not question.”

“As regards intellectual work it remains a fact, indeed, that great decisions in the realm of thought and momentous discoveries and solutions of problems are only possible to an individual, working in solitude.”

“A religion, even if it calls itself a religion of love, must be hard and unloving to those who do not belong to it.”

“Immorality, no less than morality, has at all times found support in religion.”

“Religion is an illusion and it derives its strength from the fact that it falls in with our instinctual desires.”