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.

Our human situation no longer permits us to make armed dichotomies between those who are good and those who are evil, those who are right and those who are wrong. The first blow dealt to the enemy's children will sign the death warrant of our own.

Of all the peoples whom I have studied, from city dwellers to cliff dwellers, I always find that at least 50 percent would prefer to have at least one jungle between themselves and their mothers-in-law.

Of course we need children! Adults need children in their lives to listen to and care for, to keep their imagination fresh and their hearts young and to make the future a reality for which they are willing to work.

Life is in one of its smoother phases ... I've no responsibilities in the world except friends and students and cherishing the life of the world -- and the belief that there is enough love to go round.

It is easier to change a man's religion than to change his diet.

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