Jealousy is not a barometer by which the depth of love can be read. It merely records the degree of the lover's insecurity.

I am interested in what happens to people who find the whole of life so rewarding that they are able to move through it with the same kind of delight in which a child moves through a game.

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

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

Our first and most pressing problem is how to do away with warfare as a method of solving conflicts between national groups or between groups within a society who have different views about how the society is to be run. If you look back, you will see that warfare was an invention, just as ways of handling government or taxes are inventions. You will see, too, that once people use an invention they go on using it until they find another which they think is superior.

Envy of the male role can come as much from an undervaluation of the role of wife and mother as from an overvaluation of the public aspects of achievement that have been reserved for men.

I had no reason to doubt that brains were suitable for a woman.