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

In this country, some people start being miserable about growing old while they are still young.

No society has ever yet been able to handle the temptations of technology to mastery, to waste, to exuberance, to exploration and exploitation... We have to learn to cherish this earth and cherish it as something that's fragile, that's only one, it's all we have... We have to use our scientific knowledge to correct the dangers that have come from science and technology.

Through a grandmother's voice and hands the end of life is known at the beginning.

Mourning has become unfashionable in the United States. The bereaved are supposed to pull themselves together as quickly as possible and to reweave the torn fabric of life. ... we do not allow ... for the weeks and months during which a loss is realized - a beautiful word that suggests the transmutation of the strange into something that is one's own.

If one cannot state a matter clearly enough so that even an intelligent twelve-year-old can understand it, one should remain within the cloistered walls of the university and laboratory until one gets a better grasp of one's subject matter.

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.