A zygote is a gamete's way of producing more gametes. This may be the purpose of the universe.

It seems to me that the secret of true happiness in life is to know what you are and then be content to be that, in style, head up and proud, and not yearn to be something else.

The best thing about space travel is that it made it possible to go elsewhere.

The only thing privacy laws accomplish is making the bugs smaller.

It is impossible for anyone to be responsible for another person's behavior. The most you or any leader can do is to encourage each one to be responsible for himself.

It would take centuries and he must grow and grow and grow, but he was in no hurry--he grokked that Eternity and the ever-beautifully-changing Now were identical.

Social responsibility above the level of family, or at most of tribe, requires imagination-- devotion, loyalty, all the higher virtues -- which a man must develop himself; if he has them forced down him, he will vomit them out.