Fame is also won at the expense of others. Even the well-deserved honors of the scientist or man of learning are unfair to many persons of equal achievements who get none. When one man gets a place in the sun, the others are put in a denser shade. From the point of view of the whole group there's no gain whatsoever, and perhaps a loss.

A fourth-grade reader may be a sixth-grade mathematician. The grade is an administrative device which does violence to the nature of the developmental process.

Science is a willingness to accept facts even when they are opposed to wishes.

Behavior is determined by its consequences.

If the world is to save any part of its resources for the future, it must reduce not only consumption but the number of consumers.

Old age is rather like another country. You will enjoy it more if you have prepared yourself before you go.

We do not choose survival as a value, it chooses us.