Any scientist who can't explain to an eight-year-old what he is doing is a charlatan.

One might be led to suspect that there were all sorts of things going on in the Universe which he or she did not thoroughly understand.

That is the first thing I know for sure: (1.) If the questions don't make sense, neither will the answers.

You'll forget it when you're dead, and so will I. When I'm dead, I'm going to forget everything–and I advise you to do the same.

In an unmoored life like mine, sleep and hunger and work arrange themselves to suit themselves, without consulting me.

Take it from somebody who has been around for a million years: When you get right down to it, food is practically the whole story every time.

Another flaw in the human character is that everybody wants to build and nobody wants to do maintenance.