"One of the most horrible things about commercialism is the way in which it poisons the relations of men and women. The evils of prostitution are generally recognized, but, great as they are, the effect of economic conditions on marriage seems to me even worse. There is not infrequently, in marriage, a suggestion of purchase, of acquiring a woman on condition of keeping her in a certain standard of material comfort. Often and often, a marriage hardly differs from prostitution except by being harder to escape from. The whole basis of these evils is economic. Economic causes make marriage a matter of bargain and contract, in which affection is quite secondary, and its absence constitutes no recognized reason for liberation. Marriage should be a free, spontaneous meeting of mutual instinct, filled with happiness not unmixed with a feeling akin to awe: it should involve that degree of respect of each for the other that makes even the most trifling interference with liberty an utter impossibility, and a common life enforced by one against the will of the other an unthinkable thing of deep horror."

“It seems to me now that mathematics is capable of an artistic excellence as great as that of any music, perhaps greater; not because the pleasure it gives (although very pure) is comparable, either in intensity or in the number of people who feel it, to that of music, but because it gives in absolute perfection that combination, characteristic of great art, of godlike freedom, with the sense of inevitable destiny; because, in fact, it constructs an ideal world where everything is perfect and yet true.”

“Most people would sooner die than think; in fact, they do so.”

“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.”

“For example, a man who had seen a great many white swans might argue, by our principle, that on the data it was probable that all swans were white, and this might be a perfectly sound argument. The argument is not disproved by the fact that some swans are black, because a thing may very well happen in spite of the fact that some data render it improbable. In the case of the swans, a man might know that colour is a very variable characteristic in many species of animals, and that, therefore, an induction as to colour is peculiarly liable to error. But this knowledge would be a fresh datum, by no means proving that the probability relatively to our previous data had been wrongly estimated. The fact, therefore, that things often fail to fulfill our expectations is no evidence that our expectations will not probably be fulfilled in a given case or a given class of cases. Thus our inductive principle is at any rate not capable of being disproved by an appeal to experience. The inductive principle, however, is equally incapable of being proved by an appeal to experience.”

“I am sure that university life would be better, both intellectually and morally, if most university students had temporary childless marriages. This would afford a solution to the sexual urge neither restless nor surreptitious, neither mercenary nor casual, and of such a nature that it need not take up time which ought to be given to work.”

“Mortals and Others, Volume 1 : American Essays, 1931-1935”