One should never impose one's views on a problem; one should rather study it, and in time a solution will reveal itself.

The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination. Even when the external and scientific requirements for the birth of an idea have long been there, it generally needs an external stimulus to make it actually happen; man has, so to speak, to stumble right up against the thing before the idea comes.

Be a loner. That gives you time to wonder, to search for the truth. Have holy curiosity. Make your life worth living.

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.

I am an absolute pacifist...It is an instinctive feeling. It is a feeling that possesses me, because the murder of men is disgusting.

The feeling for what ought and ought not to be grows and dies like a tree, and no fertilizer of any kind will do much good. What the individual can do is give a fine example, and have the courage to firmly uphold ethical convictions in a society of cynics. I have for a long time tried to conduct myself this way, with varying success.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.