“If we were all given by magic the power to read each other's thoughts, I suppose the first effect would be to dissolve all friendships.”

“There is no reason to suppose that the world had a beginning at all. The idea that things must have a beginning is really due to the poverty of our thoughts.”

“Life cannot remain tolerable unless we learn to let each other alone in all matters that are not of immediate and obvious concern to the community. We must learn to respect each other’s privacy, and not to impose our moral standards upon each other. The Puritan imagines that his moral standard is THE moral standard; he does not realize that other ages and other countries, and even other groups in his own country, have moral standard different from his, to which they have as good a right as he has to his.”

“During the war, the holders of power in all countries found it necessary to bribe the populations into cooperation by unusual concessions. Wage-earners were allowed a living wage, Hindus were told they were men and brothers, women were given the vote, and young people were allowed to enjoy those innocent pleasures of which the old, in the name of morality, always wish to rob them. The war being won, the victors set to work to deprive their tools of advantages temporarily conceded.”

“Pure mathematics consists entirely of assertions to the effect that, if such and such a proposition is true of anything, then such and such another proposition is true of that thing. It is essential not to discuss whether the first proposition is really true, and not to mention what the anything is, of which it is supposed to be true. [...] Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true. People who have been puzzled by the beginnings of mathematics will, I hope, find comfort in this definition, and will probably agree that it is accurate.”

“The meta-physical creed, I shall maintain, is a mistaken outcome of the emotion, although this emotion, as colouring and informing all other thoughts and feelings, is the inspirer of whatever is best in Man.”

“If I were to suggest that between the Earth and Mars there is a china teapot revolving about the sun in an elliptical orbit, nobody would be able to disprove my assertion provided I were careful to add that the teapot is too small to be revealed even by our most powerful telescopes. But if I were to go on to say that, since my assertion cannot be disproved, it is an intolerable presumption on the part of human reason to doubt it, I should rightly be thought to be talking nonsense. If, however, the existence of such a teapot were affirmed in ancient books, taught as the sacred truth every Sunday, and instilled into the minds of children at school, hesitation to believe in its existence would become a mark of eccentricity and entitle the doubter to the attentions of the psychiatrist in an enlightened age or of the Inquisitor in an earlier time.”