We — mankind — stand at the center of an evolutionary crisis, with a new evolutionary device — our consciousness of the crisis — as our unique contribution.

Monogamous heterosexual love is probably one of the most difficult, complex and demanding of human relationships.

We may say that many, if not all, of the personality traits which we have called masculine or feminine are as lightly linked to sex as are the clothing, the manners, and the form of headdress that a society at a given period assigns to either sex.

EARTH DAY reminds the people of the world of the need for continuing care which is vital to Earth's safety.

American society is very like a fish society. . . . Among certain species of fish, the only thing which determines order of dominance is length of time in the fishbowl. The oldest resident picks on the newest resident, and if the newest resident is removed to a new bowl, he, as oldest resident, will pick on the newcomers.

Children must be taught how to think, not what to think.

I discovered when I had a child of my own that I had become a biased observer of small children. Instead of looking at them with affectionate but nonpartisan eyes, I saw each of them as older or younger, bigger or smaller, more or less graceful, intelligent, or skilled than my own child.