To grow old is to pass from passion to compassion.

The danger of lectures is that they create the illusion of teaching for teachers, and the illusion of learning for learners.

The only really committed artist is he who, without refusing to take part in the combat, at least refuses to join the regular armies and remains a freelance.

My life was lucky so that I met, I loved (and disappointed) only outstanding people.

To create today is to create dangerously. Any publication is an act, and that act exposes one to the passions of an age that forgives nothing.

This is the century of fear.

But again and again there comes a time in history when the man who dares to say that two and two make four is punished with death. The schoolteacher is well aware of this. And the question is not one of knowing what punishment or reward attends the making of this calculation. The question is one of knowing whether two and two do make four