"When a wise man does not understand, he says: "I do not understand." The fool and the uncultured are ashamed of their ignorance. They remain silent when a question could bring them wisdom."

“A person cries out against life because it's lonely, and because life's broken off from whatever created it. But no matter how much you hate life, you love it, too. It's like a caldron boiling with everything you have to have — but very painful to the lips.”

“If you ask "Should we be in space?" you ask a nonsense question. We are in space. We will be in space.”

“Arabic and Islamic themes in Frank Herbert's Dune novels”

“Ramsey could contain the question no longer. "What's your definition of sanity, Skipper?" "The ability to swim," said Sparrow...."That means the sane person has to understand currents, has to know what's required in different waters.”

“All governments suffer a recurring problem: Power attracts pathological personalities. It is not that power corrupts but that it is magnetic to the corruptible. Such people have a tendency to become drunk on violence, a condition to which they are quickly addicted.”

“You can say things which cannot be done. This is elementary. The trick is to keep attention focused on what is said and not on what can be done.”