Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

In a dilemma, it is helpful to change any variable, then reexamine the problem.

Anyone can see a forest fire. Skill lies in sniffing the first smoke.

I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.

Certainly the game is rigged. Don't let that stop you; if you don't bet you can't win.

With eternity to draw on there could be no reason for hurrying - 'hurry' was not a concept in Martian.

You got the impression that he never needed to sleep - just ten-thousand-mile checkups and dust him off occasionally.