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?

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.

I'm interested in the psychological exploration of human nature, and it just happens to come in the form of film-making.

You teach your daughters the diameters of the planets and wonder when you are done that they do not delight in your company.