What makes the engine go? Desire, desire, desire.
Man is distinguished from all other creatures by the faculty of laughter.
His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even... knowledge, was foolproof.
There is only one success - to be able to spend your life in your own way.
There is a great deal of difference between an eager man who wants to read a book and the tired man who wants a book to read.
It's a dangerous business going out your front door.
It's very hard to take yourself too seriously when you look at the world from outer space.