Americans need rest, but do not know it.

The only thing that will redeem mankind is cooperation.

While economics is about how people make choice, sociology is about how they don't have any choice to make.

Italy, and the spring and first love all together should suffice to make the gloomiest person happy.

Arithmetic must be discovered in just the same sense in which Columbus discovered the West Indies, and we no more create numbers than he created the Indians.

Uncertainty in the pressure of vivid hopes and fears is painful, but must be endured if we wish to live without the support of comforting fairy tales.

...I am afraid that education is conceived more in terms of indoctrination by most school officials than in terms of enlightenment. My own belief is that education must be subversive if it is to be meaningful. By this I mean that it must challenge all the things we take for granted, examine all accepted assumptions, tamper with every sacred cow, and instill a desire to question and doubt. Without this the mere instruction to memorise data is empty. The attempt to enforce conventional mediocrity on the young is criminal.