Grief is the price of victory.

In politics, the tripod is he most unstable of all structures. It's be bad enough without the complication of a feudal trade culture which turns its back on most science.

The past is no farther away than your pillow.

Thinking you know something is a sure way to blind yourself.

All governments suffer a recurring problem: Power attracts pathological personalities. It is not that power corrupts but that it is magnetic to the corruptible. Such people have a tendency to become drunk on violence, a condition to which they are quickly addicted.

We are generalists. You can't draw neat lines around planet-wide problems. Planetology is a cut-and-fit science.

Irreverence is a most necessary ingredient of religion. Not to speak of its importance in philosophy. Irreverence is the only way left to us for testing our universe.