If I were not a Jew I would be a Quaker.

Science can only ascertain what is, but not what should be, and outside of its domain value judgements of all kinds remain necessary.

I am not a Jew in the sense that I would demand the preservation of the Jewish or any other nationality as an end in itself. Rather, I see Jewish nationality as a fact and I believe that every Jew must draw the consequences from this fact.

He who finds a thought that lets us a little deeper into the eternal mystery of nature has been granted great peace.

What I see in Nature is a grand design that we can understand only imperfectly, one with which a responsible person must look at with humility.

Relativity teaches us the connection between the different descriptions of one and the same reality.

The problems that exist in this world can not be solved by the level of thinking that created them.