It is not known why the Lord made the human body as he did, since one might suppose that omnipotence could have made it such as would not have shocked the nice people.

Ethics is in origin the art of recommending to others the sacrifices required for cooperation with oneself.

Americans and Englishmen, when they become acquainted with the Balkans, feel an astonished contempt when they study the mutual enmities of Bulgarians and Serbs, of Hungarians and Rumanians. It is evident to them that these enmities are absurd and that the belief of each little nation in its own superiority has no objective basis. But most of them are quite unable to see that the national pride of a Great Power is essentially as unjustifiable as that of a little Balkan country.

In all the creative work that I have done, what has come first is a problem, a puzzle involving discomfort.

Is the set of all sets which are not members of themselves a member of itself?

The fact that all Mathematics is Symbolic Logic is one of the greatest discoveries of our age; and when this fact has been established, the remainder of the principles of mathematics consists of the analysis of Symbolic Logic itself.

Collective wisdom, alas, is no adequate substitute for the intelligence of individuals. Individuals who opposed received opinions have been the source of all progress, both moral and intellectual. They have been unpopular, as was natural.