I learned to observe the world around me, and to note what I saw

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

Whatever advantages may have arisen, in the past, out of the existence of a specially favored and highly privileged aristocracy, it is clear to me that today no argument can stand that supports unequal opportunity or any intrinsic disqualification for sharing in the whole of life.

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

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.

As far back as our knowledge takes us, human beings have lived in families. We know of no period when this was not so. We know of no people who have succeeded for long in dissolving the family or displacing it.

The institution of marriage in all societies is a pattern within which the strains put by civilization on males and females alike must be resolved, a pattern within which men must learn, in return for a variety of elaborate rewards, new forms in which sexual spontaneity is still possible, and women must learn to discipline their receptivity to a thousand other considerations.