"I am the only guinea pig I have."

"Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering."

"Either war is obsolete or men are."

"Humanity is acquiring all the right technology for all the wrong reasons."

"Dare to be naive."

"Now there is one outstandingly important fact regarding Spaceship Earth, and that is that no instruction book came with it."

"In this age, which believes that there is a short cut to everything, the greatest lesson to be learned is that the most difficult way is, in the long run, the easiest."

"Boys don't make passes at female smartasses."

"We notice things that don't work. We don't notice things that do. We notice computers, we don't notice pennies. We notice e-book readers, we don't notice books."

"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music he hears, how ever measured or far away."

"Admiration, n.: Our polite recognition of another's resemblance to ourselves."

"See, in my line of work you got to keep repeating things over and over and over again for the truth to sink in, to kind of catapult the propaganda."