History does not always repeat itself. Sometimes it just yells, 'Can't you remember anything I told you?' and lets fly with a club.

Immunity corrupts; absolute immunity corrupts absolutely.

Pioneering basically amounts to finding new and more horrible ways to die

Never accept the initial premise of the opposition.

No literature is sound, no philosophy of action workable, if it doesn't take a hard look at itself.

There's nothing quite so stultifying as having someone around who has all the answers-and gives them to you.

We presuppose two things: that there is yet to be learned infinitely more than is now known, and that man can learn it.