True art can only spring from the intimate linking of the serious and the playful.

Napoleon affords us an example of the danger of elevating one's self to the absolute, and sacrificing everything to the carrying out of an idea.

If the mass of people hesitate to act, strike with swiftly and with boldness, the brave heart that understands and seizes opportunity can everything.

What is not fully understood is not possessed.

Energy is the basis of everything. Every Jew, no matter how insignificant, is engaged in some decisive and immediate pursuit of a goal... It is the most perpetual people of the earth.

The threshold is the place of expectation.

The history of science is science itself; the history of the individual, the individual.