God could cause us considerable embarrassment by revealing all the secrets of nature to us: we should not know what to do for sheer apathy and boredom.

All one needs to do is declare oneself free and one will immediately feel dependent. If you dare to declare yourself dependent, you feel independent.

Analysis and synthesis are both as necessary to the thinking spirit as inspiration and expiration to the organism.

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.

What a torment it is to see so much loveliness passing and repassing before us, and yet not dare to lay hold of it!

Whatever Nature undertakes, she can only accomplish it in a sequence. She never makes a leap.

Divide and rule, the politician cries; unite and lead, is watchword of the wise.