The thinking that got us to where we are is not the thinking that will get us to where we want to be.

How I wish that somewhere there existed an island for those who are wise and of good will.

The thing is, not to stop questioning.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

What a person thinks on his own without being stimulated by the thoughts and experiences of the other people is even in the best case rather paltry and monotonous.

You cannot prevent and prepare for war at the same time.

With me every peep becomes a trumpet solo.