Nothing causes more consternation in a group of hypocrits than one honest man.

You do not really understand something unless you can explain it to your grandmother.

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.

In theory, theory and practice are the same. In practice, they are not.

Check out not to become a man or woman of achievement, but instead seek to become a particular person of price.

Nature conceals her secrets because she is sublime, not because she is a trickster.

Mathematics are well and good but Nature keeps dragging us around by the nose.