Pure mathematics consists entirely of assertions to the effect that, if such and such a proposition is true of anything, then suchand such another proposition is true of that thing.... 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.

Politics is concerned with herds rather than with individuals, and the passions which are important in politics are, therefore, those in which the various members of a given herd can feel alike.

The best practical advice I can give to the present generation is to practice the virtue which the Christians call love.

I would never die for my beliefs because I might be wrong.

All exact science is dominated by the idea of approximation.

Whether science-and indeed civilization in general-can long survive depends upon psychology, that is to say, it depends upon what human beings desire.

Politics is largely governed by sententious platitudes which are devoid of truth