All theoretical chemistry is really physics; and all theoretical chemists know it.

To develop working ideas efficiently, I try to fail as fast as I can.

Physics is not the most important thing. Love is.

The first principle is that you must not fool yourself and you are the easiest person to fool.

We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

Science is like sex: sometimes something useful comes out, but that is not the reason we are doing it

Some things that satisfy the rules of algebra can be interesting to mathematicians even though they don't always represent a real situation.