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.

No, this trick won't work... How on earth are you ever going to explain in terms of chemistry and physics so important a biological phenomenon as first love?

When I was young, all I wanted and expected from life was to sit quietly in some corner doing my work without the public paying attention to me. And now see what has become of me.

The world we have created is a product of our thinking.

Curiosity has its own reason for existence.

The ability to portray people in still life and in motion requires the highest measure of intuition and talent.

Gradually the conviction gained recognition that all knowledge about things is exclusively a working-over of the raw material furnished by the senses. ... Galileo and Hume first upheld this principle with full clarity and decisiveness.