Henri Poincare

To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.

Mathematics is the art of giving the same name to different things.

How is an error possible in mathematics?

They said I couldn't play anything but an English boy. I knew I could. So I went to New York.

Recently, I was in Bernalda, my dad's ancestral home town in Italy. He has just refurbished a palazzo and turned it into a hotel, so we had my sister's wedding there. It was beautiful.

If you're not having a good time, find something else that gives you some joy in life.