in all cultures, human beings - in order to be human - must understand the nonhuman.

I used to say to my classes that the ways to get insight are: to study infants; to study animals; to study primitive people; to be psychoanalyzed; to have a religious conversion and get over it; to have a psychotic episode and get over it; or to have a love affair with an old Russian. And I stopped saying that when a little dancer in the front row put up her hand and said, 'Does he have to be old?

Contentment can be bought at a price that one can not possibly pay.

The negative cautions of science are never popular.

It has been a woman's task throughout history to go on believing in life when there was almost no hope.

Man's most human characteristic is not his ability to learn, which he shares with many other species, but his ability to teach and store what others have developed and taught him.

Earth Day is the first holy day which transcends all national borders, yet preserves all geographical integrities, spans mountains and oceans and time belts, and yet brings people all over the world into one resonating accord, is devoted to the preservation of the harmony in nature and yet draws upon the triumphs of technology, the measurement of time, and instantaneous communication through space.