Happiness consists in getting enough sleep. Just that, nothing more.

I was not offended, my love. An insult is like a drink; it affects one only if accepted. And pride is too heavy baggage for my journey.

Your enemy is never a villain in his own eyes.

It was equally imperative that this chain of reactions should always tend to dampen, to die out. It must not build up, or the uranium mass would explode within a time interval too short to be measured by any means whatsoever. Nor would there be anyone left to measure it.

Spacemen - men who work in space, pilots and jetmen and astrogators and such - are men who like a few million miles of elbow room.

Citizenship is an attitude, a state of mind, an emotional conviction that the whole is greater than the part...and that the part should be humbly proud to sacrifice itself that the whole may live.

Courage is the complement of fear. A man who is fearless cannot be courageous. [He is also a fool.]