And I repeat: if there is anything that can divert the land of my birth from its current stampede into the Stone Age, it is the widespread dissemination of the thoughts and perceptions that Robert Heinlein has been selling as entertainment since 1939.

...I know good design when I fail to trip over it.

This is what it is to be human: to see the essential existential futility of all action, all striving -- and to act, to strive. This is what it is to be human: to reach forever beyond your grasp. This is what it is to be human: to live forever or die trying. This is what it is to be human: to perpetually ask the unanswerable questions, in the hope that the asking of them will somehow hasten the day when they will be answered. This is what it is to be human: to strive in the face of the certainty of failure. This is what it is to be human: to persist.

Sexual intercourse vests no property rights.

If a person who indulges in gluttony is a glutton, and a person who commits a felony is a felon, then God is an iron.

Librarians are the secret masters of the world. They control information. Don't ever piss one off.

It took me better than a quarter century to learn, the hard way, that hard work at something you want to be doing is the most fun that you can have out of bed . . . to learn that the smart man finds ways to make everything he does be work; to learn that "leisure" time is truly pleasurable (indeed tolerable) only to the extent that is its subconscious grazing for information with which to infuse newer, better work.