“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.”

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

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

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

“Religion is an attempt to get control over the sensory world, in which we are placed, by means of the wish-world, which we have developed inside us as a result of biological and psychological necessities. But it cannot achieve its end. Its doctrines carry with them the stamp of the times in which they originated, the ignorant childhood days of the human race. Its consolations deserve no trust. Experience teaches us that the world is not a nursery. The ethical commands, to which religion seeks to lend its weight, require some other foundations instead, for human society cannot do without them, and it is dangerous to link up obedience to them with religious belief. If one attempts to assign to religion its place in man’s evolution, it seems not so much to be a lasting acquisition, as a parallel to the neurosis which the civilized individual must pass through on his way from childhood to maturity.”

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

“In my Future of an Illusion I was concerned [...] with what the ordinary man understands by his religion, that system of doctrines and pledges that on the one hand explains the riddle of this world to him with an enviable completeness, and on the other assures him that a solicitous Providence is watching over him and will make up to him in a future existence for any shortcomings in this life. The ordinary man cannot imagine this Providence in any other from but that of a greatly exalted father, for only such a one could understand the needs of the sons of men, or be softened by their prayers and placated by the signs of their remorse. The whole thing is so patently infantile, so incongruous with reality, that to one whose attitude to humanity is friendly it is painful to think that the great majority of mortals will never be able to rise above this view of life.”