Clearly I miss Him, having been brought up in religion. But now a man must be responsible to himself.

Never mistake motion for action.

The best way to find out if you can trust somebody is to trust them.

Now I am depressed myself,' I said. 'That's why I never think about these things. I never think and yet when I begin to talk I say the things I have found out in my mind without thinking.

To invent out of knowledge means to produce inventions that are true. Every man should have a built-in automatic crap detector operating inside him. It also should have a manual drill and a crank handle in case the machine breaks down. If you're going to write, you have to find out what's bad for you. Part of that you learn fast, and then you learn what's good for you.

When you stop doing things for fun you might as well be dead.

One cat just leads to another." [Letter from Finca Vigia, Cuba, to his first wife, Elizabeth Hadley Richardson (1943).]