I tell you, with complex numbers you can do anything.

Asked if Stalin was an antisemite, Robert Conquest replied: Yes, but it hardly noticed. He was broadly and generously anti-human.

I never ponder counterfactuals.

I tell you, with complex numbers you can do anything.

Nonmathematical people sometimes ask me, “You know math, huh? Tell me something I’ve always wondered, What is infinity divided by infinity?” I can only reply, “The words you just uttered do not make sense. That was not a mathematical sentence. You spoke of ‘infinity’ as if it were a number. It’s not. You may as well ask, 'What is truth divided by beauty?’ I have no clue. I only know how to divide numbers. ‘Infinity,’ ‘truth,’ ‘beauty’—those are not numbers.

Politics, as any observer of the modern world knows, is the enemy of economics, everywhere and always.

The sympathies of a well-adjusted person can easily be aroused by the plight of strangers. Indeed, the skillful writer of a novel, a play, or an opera can engage our emotions on behalf of people who are not only strangers to us, but who do not even exist! And a person whose emotions cannot be so aroused is not behaving normally.