I have firmly decided to bite the dust with a minimum of medical assistance when my time comes, and up to then to sin to my wicked heart's content.

My relationship to the Jewish people has become my strongest human bond, ever since I became fully aware of our precarious situation among the nations of the world.

I live in that solitude which is painful in youth, but delicious in the years of maturity.

There is a driving force more powerful than steam, electricity and nuclear power: the will.

You imagine that I look back on my life's work with calm satisfaction. But from nearby it looks quite different. There is not a single concept of which I am convinced that it will stand firm, and I feel uncertain whether I am in general on the right track.

We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know.

Anger dwells only in the bosom of fools.