By academic freedom I understand the right to search for truth and to publish and teach what one holds to be true. This right implies also a duty: one must not conceal any part of what on has recognized to be true. It is evident that any restriction on academic freedom acts in such a way as to hamper the dissemination of knowledge among the people and thereby impedes national judgment and action.

The only mistake in life is the lesson not learned.

The Bible is a collection of honorable, but primitive legends which are still nevertheless pretty childish.

This is too difficult for a mathematician. It takes a philosopher. The hardest thing in the world to understand is the income tax.

I was originally supposed to become an engineer but the thought of having to expend my creative energy on things that make practical everyday life even more refined, with a loathsome capital gain as the goal, was unbearable to me.

I never commit to memory anything that can easily be looked up in a book

It is really a puzzle what drives one to take one's work so devilishly seriously.