A good mathematical joke is better, and better mathematics, than a dozen mediocre papers.

The surprising thing about this paper is that a man who could write it would.

The referee said it was not acceptable, but the Press considered they could not refuse to publish a book by a professor of the university.

The infinitely competent can be uncreative.

I recall once saying that when I had given the same lecture several times I couldn't help feeling that they really ought to know it by now.

The higher mental activities are pretty tough and resilient, but it is a devastating experience if the drive does stop. Some people lose it in their forties and can only stop. In England they are a source of Vice-Chancellors.

A heavy warning used to be given that pictures are not rigorous; this has never had its bluff called and has permanently frightened its victims into playing for safety.