Humiliation and mental oppression by ignorant and selfish teachers wreak havoc in the youthful mind that can never be undone and often exert a baleful influence in later life.

We must be prepared to make the same heroic sacrifices for the cause of peace that we make ungrudgingly for the cause of war.

The secret to creativity is knowing how to hide your sources.

I never think of the future. It comes soon enough. When visiting the U.S. from Germany for a winter academic stay.

There is a race between mankind and the universe. Mankind is trying to build bigger, better, faster, and more foolproof machines. The universe is trying to build bigger, better, and faster fools. So far the universe is winning.

You must be aware that most men (and also not only a few women) are by nature not monogamous. This nature makes itself even more forceful when tradition and circumstance stand in an individual's way.

The last thing to collapse is the surface.