We love our habits more than our income, often more than our life.

I have sought love, first, because it brings ecstasy – ecstasy so great that I would often have sacrificed all the rest of life for a few hours of that joy. ... I have sought it, finally, because in the union of love I have seen, in a mystic miniature, the prefiguring vision of the heaven that saints and poets have imagined.

Men who are unhappy, like men who sleep badly, are always proud of the fact.

Every increase in knowledge requires an increase in wisdom

Ordinary language is totally unsuited for expressing what physics really asserts, since the words of everyday life are not sufficiently abstract. Only mathematics and mathematical logic can say as little as the physicist means to say.

Every housemaid expects at least once a week as much excitement as would have lasted a Jane Austen heroine throughout a whole novel.

Christ . . . said that a man who had looked after a woman lustfully had sinned as much as the man who had seduced her. How absurd!