Psychosclerosis: the hardening of the attitude which causes a person to cease dreaming, seeing, thinking, and leading.

For the person and for the species love is the form of behavior having the highest survival value.

The doctor has been taught to be interested not in health but in disease. What the public is taught is that health is the cure for disease.

Today, while the titular head of the family may still be the father, everyone knows that he is little more than chairman, at most, of the entertainment committee.

Scientists do not believe in fundamental and absolute certainties. For the scientist, certainty is never an end, but a search; not the ordering of certainty, but its exploration. For the scientist, certainty represents the highest degree of probability.

The cultured man is an artist, an artist in humanity.

Hatred is love frustrated.