What is new in our time is the increased power of the authorities to enforce their prejudices.

One of the main causes of trouble in the world is dogmatic and fanatical belief in some doctrine for which there is no adequate evidence

Science, by itself cannot, supply us with an ethic.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as poetry.

Man is a rational animal – so at least I have been told. Throughout a long life, I have looked diligently for evidence in favour of this statement, but so far I have not had the good fortune to come across it, though I have searched in many countries spread over three continents.

Joy of life... depends upon a certain spontaneity in regard to sex. Where sex is repressed, only work remains, and a gospel of work for work's sake never produced any work worth doing.

No Carthaginian denied Moloch, because to do so would have required more courage that was required to face death in battle.