There comes a time in the life of every human when he or she must decide to risk ‘his life, his fortune and his sacred honor’ on an outcome dubious. Those who fail the challenge are merely overgrown children, can never be anything else.

Geniuses and supergeniuses always make their own rules about sex as on everything else; they do not accept the monkey customs of their lessers.

Around the time of the Terran Caesar Augustus, a Martian artist had been composing a work of art. It could have been called a poem, a musical opus, or a philosophical treatise; it was a series of emotions arranged in tragic, logical necessity. Since it could be experienced by a human only in the sense in which a man blind from birth might have a sunset explained to him, it does not matter which category it be assigned.

A slave cannot be freed, save he do it himself. Nor can you enslave a free man; the very most you can do is kill him!

Secrecy is the keystone to all tyranny. Not force, but secrecy and censorship. When any government or church for that matter, undertakes to say to its subjects, "This you may not read, this you must not know," the end result is tyranny and oppression, no matter how holy the motives. Mighty little force is needed to control a man who has been hoodwinked in this fashion; contrariwise, no amount of force can control a free man, whose mind is free. No, not the rack nor the atomic bomb, not anything. You can't conquer a free man; the most you can do is kill him.

Money is truthful. If a man speaks of his honor, make him pay cash.

Anyone who cannot cope with mathematics is not fully human. At best, he is a tolerable subhuman who has learned to wear his shoes, bathe, and not make messes in the house.