I don’t believe in psychology. I believe in good moves.

Mathematics is not a deductive science - that’s a cliché. When you try to prove a theorem, you don’t just list the hypotheses, and then start to reason. What you do is trial and error, experimentation, guesswork.

Maybe people have to really suffer before they can risk doing what they love.

Life is what happens to you while you’re busy making other plans.

Liever betalen voor een bom dan voor niks met een vuilbak.