"My own opinion—which I may as well indicate at the outset—is that pure Anarchism, though it should be the ultimate ideal, to which society should continually approximate, is for the present impossible, and would not survive more than a year or two at most if it were adopted. On the other hand, both Marxian Socialism and Syndicalism, in spite of many drawbacks, seem to me calculated to give rise to a happier and better world than that in which we live. I do not, however, regard either of them as the best practicable system. Marxian Socialism, I fear, would give far too much power to the State, while Syndicalism, which aims at abolishing the State, would, I believe, find itself forced to reconstruct a central authority in order to put an end to the rivalries of different groups of producers. The best practicable system, to my mind, is that of Guild Socialism, which concedes what is valid both in the claims of the State Socialists and in the Syndicalist fear of the State, by adopting a system of federalism among trades for reasons similar to those which are recommending federalism among nations."

“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”