A tyranny based on ... deception and maintained by terror must inevitably perish from the poison it generates within itself.

He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed.

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

To have security against atomic bombs and against the other biological weapons, we have to prevent war, for if we cannot prevent war every nation will use every means that is at their disposal; and in spite of all promises they make, they will do it. At the same time, so long as war is not prevented, all the governments of the nations have to prepare for war, and if you have to prepare for war, then you are in a state where you cannot abolish war.

The strength of the Constitution lies entirely in the determination of each citizen to defend it. Only if every single citizen feels duty bound to do his share in this defense are the constitutional rights secure.

Germany had the misfortune of becoming poisoned, first because of plenty, and then because of want.

If you do the same thing over and over again you cannot ever expect a different outcome.