"Experience: that most brutal of teachers. But you learn, my God do you learn."

"Friendship is unnecessary, like philosophy, like art... It has no survival value rather it is one of those things that give value to survival."

"Telling us to obey instinct is like telling us to obey 'people.' People say different things: so do instincts. Our instincts are at war... Each instinct, if you listen to it, will claim to be gratified at the expense of the rest."

"You can't get a cup of tea big enough or a book long enough to suit me."

"History teaches that war begins when governments believe the price of aggression is cheap."

"Over the past 20 years, I have noticed that the most flexible, dynamic, inquisitive minds among my students have been industrial design majors. Industrial designers are bracingly free of ideology and cant. The industrial designer is trained to be a clear-eyed observer of the commercial world - which, like it or not, is modern reality."

"Observation is an old man's memory."

"Arguing that God doesn't exist would be like people in the 10th century arguing that germs and microbes didn't exist because they couldn't see them."