Quote by Robert A. Heinlein (1907-1988)

• The greatest productive force is human selfishness.

• 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.

• Luck is a tag given by the mediocre to account for the accomplishments of genius.

• Of all the nonsense that twists the world, the concept of 'altruism' is the worst. People do what they want to do, every time.

• A poet that reads his verse in public may have other nasty habits.

• Writing is not necessarily something to be ashamed of, but do it in private and wash your hands afterwards.