Making mathematics accessible to the educated layman, while keeping high scientific standards, has always been considered a treacherous navigation between the Scylla of professional contempt and the Charybdis of public misunderstanding.

A technique is a trick that works.

Running overtime is the one unforgivable error a lecturer can make. After fifty minutes (one microcentury as von Neumann used to say) everybody's attention will turn elsewhere.

Stan Ulam was lazy, ... He talked too much ... He was self-centered ... . He had an overpowering personality.

We often hear that mathematics consists mainly of "proving theorems." Is a writer's job mainly that of "writing sentences?"

How did he do it? He must be a genius!

God created infinity, and man, unable to understand infinity, had to invent finite sets.