It is a truism that the structure of a society is basically determined by its technology. Not in an absolute sense-there may be totally different cultures using identical tools-but the tools settle the possibilities; you can't have interstellar trade without spaceships. A race limited to a single planet, possessing a high knowledge of mechanics but with its basic machines of industry and war requiring a large capital investment, will inevitably tend toward collectivism under one name or another. Free enterprise needs elbow room.

A fanatic's willingness to kill or be killed in the service of a cause cannot prove the rightness of that cause.

Give fear no hold on you. Keep sinews loose and senses open, ready at every instant to flow with the rush of action.

A fanatic is a man who, when he's lost sight of his purpose, redoubles his effort.

My knowledge of the human psyche is as yet imperfect. Certain areas won't yield to computation.

Better a life like a falling star, brief bright across the dark, than the long, long waiting of the immortals, loveless and cheerlessly wise.

Let us settle down to the serious business of getting drunk.