“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.”

“I can imagine that the oceanic feeling could become connected with religion later on. That feeling of oneness with the universe which is its ideational content sounds very like a first attempt at the consolations of religion, like another way taken by the ego of denying the dangers it sees threatening it in the external world.”

“It goes without saying that a civilization which leaves so large a number of its participants unsatisfied and drives them into revolt neither has nor deserves the prospect of a lasting existence.”

“We believe that it is possible for scientific work to gain some knowledge about the reality of the world, by means of which we can increase out power and in accordance with which we can arrange our life. If this belief is an illusion, then we are in the same position as you. But science has given us evidence by its numerous and important successes that it is no illusion.”

“Our possibilities of happiness are already restricted by our constitution. Unhappiness is much less difficult to experience. We are threatened with suffering from three directions: from our own body, which is doomed to decay and dissolution and which cannot even do without pain and anxiety as warning signals; from the external world, which may rage against us with overwhelming and merciless forces of destruction; and finally from our relations to other men. The suffering which comes from this last source is perhaps more painful to us than any other.”

“Experience teaches that for most people there is a limit beyond which their constitution cannot comply with the demands of civilization. All who wish to reach a higher standard than their constitution will allow, fall victims to neurosis. It would have been better for them if they could have remained less "perfect".”

“scientific knowledge has taught [humans] much since the days of the Deluge, and it will increase their power still further. And, as for the great necessities of Fate, against which there is no help, they will learn to endure them with resignation. Of what use to them is the mirage of wide acres in the moon, whose harvest no one has ever yet seen? As honest smallholders on this earth they will know how to cultivate their plot in such a way that it supports them. By withdrawing their expectations from the other world and concentrating all their liberated energies into their life on earth, they will probably succeed in achieving a state of things in which life will become tolerable for everyone and civilization no longer oppressive to anyone. Then, with one of our fellow-unbelievers, they will be able to say without regret: 'We leave Heaven to the angels and the sparrows.”