It is only men who are free, who create the inventions and intellectual works which to us moderns make life worth while.

When you look at yourself from a universal standpoint, something inside always reminds or informs you that there are bigger and better things to worry about.

Women always worry about things that men forget; men always worry about things women remember.

Almost all the other fellows do not look from the facts to the theory but from the theory to the facts; they cannot get out of the network of already accepted concepts; instead, comically, they only wriggle about inside.

If I had only one hour to save the world, I would spend fifty-five minutes defining the problem, and only five minutes finding the solution.

The most incomprehensible thing about the world is that it is comprehensible.

I love to travel, but hate to arrive.