There ain't no such thing as a free lunch." A Libertarian Movement slogan - The Moon Is a Harsh Mistress, 1907.

Specialization is for insects... The race of man? He's a whole other creature.

I think that science fiction has a distinct therapeutic value because all of it has as its primary postulate that the world does change. I cannot overemphasize the importance of that idea.

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.

Roman matrons used to say to their sons: 'Come back with your shield or on it.' Later on, this custom declined. So did Rome... (but not before it created an Empire that changed the world -EM).

Any group is weaker than a man alone unless they are perfectly trained to work together.

A zest for living must include a willingness to die.