Female animals defending their young are notoriously ferocious and lack the playful delight in combat which characterizes the mock combats of males of the same species. There seems very little ground for claiming that the mother of young children is more peaceful, more responsible, and more thoughtful for the welfare of the human race than is her husband or brother.

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.

A small group of thoughtful people could change the world.

Don't depend on governments or corporations to fix problems. Social revolutions are led by passionate individuals and that's what makes the difference.

The way in which each human infant is transformed into the finished adult, into the complicated individual version of his city and his century is one of the most fascinating studies open to the curious minded.

... some veil between childhood and the present is necessary. If the veil is withdrawn, the artistic imagination sickens and dies, the prophet looks in the mirror with a disillusioned and cynical sneer, the scientist goes fishing.