A lot of scientists act on their beliefs and so do things that look crazy to the rest of us.

The invisible hand never picks up the check.

A lot of scientists act on their beliefs and so do things that look crazy to the rest of us.

The only part of an argument that really matters is what we think of the people arguing.

It's fragile what we know. It's gone every time we forget. Then someone has to learn it all over again.

It would take 2,000 Vietnam Memorials to list the [Twentieth] century's war dead.

Whistling together. Some kind of performance. I mean, not just a conversation, but a performance.