“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.”

“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.”

“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.”

“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.”

“Three tendencies can be observed in the estimation of dreams. Many philosophers have given currency to one of these tendencies, one which at the same time preserves something of the dream's former over-valuation. The foundation of dream life is for them a peculiar state of psychical activity, which they even celebrate as elevation to some higher state. Schubert, for instance, claims: "The dream is the liberation of the spirit from the pressure of external nature, a detachment of the soul from the fetters of matter." Not all go so far as this, but many maintain that dreams have their origin in real spiritual excitations, and are the outward manifestations of spiritual powers whose free movements have been hampered during the day ("Dream Phantasies," Scherner, Volkelt). A large number of observers acknowledge that dream life is capable of extraordinary achievements—at any rate, in certain fields ("Memory").”

“The time comes when each of us has to give up as illusions the expectations which, in his youth, he pinned upon his fellow-men, and when he may learn how much difficulty and pain has been added to his life by their ill-will.”

“It sounds like a fairy-tale, but not only that; this story of what man by his science and practical inventions has achieved on this earth, where he first appeared as a weakly member of the animal kingdom, and on which each individual of his species must ever again appear as a helpless infant... is a direct fulfilment of all, or of most, of the dearest wishes in his fairy-tales. All these possessions he has acquired through culture. Long ago he formed an ideal conception of omnipotence and omniscience which he embodied in his gods. Whatever seemed unattainable to his desires - or forbidden to him - he attributed to these gods. One may say, therefore, that these gods were the ideals of his culture. Now he has himself approached very near to realizing this ideal, he has nearly become a god himself. But only, it is true, in the way that ideals are usually realized in the general experience of humanity. Not completely; in some respects not at all, in others only by halves. Man has become a god by means of artificial limbs, so to speak, quite magnificent when equipped with all his accessory organs; but they do not grow on him and they still give him trouble at times... Future ages will produce further great advances in this realm of culture, probably inconceivable now, and will increase man's likeness to a god still more.”