Injustice experienced in the flesh, in deeply wounded flesh, is the stuff out of which change explodes.

It is not until science has become a discipline to which the research ability of any mind from any class in society can be attracted that it can become rigorously scientific.

Motherhood is a biological fact, while fatherhood is a social invention.

The differences between the two sexes is one of the important conditions upon which we have built the many varieties of human culture that give human beings dignity and stature.

Any town that doesn't have sidewalks doesn't love its children.

most people prefer to carry out the kinds of experiments that allow the scientist to feel that he is in full control of the situation rather than surrendering himself to the situation, as one must in studying human beings as they actually live.

EARTH DAY uses one of humanity's great discoveries, the discovery of anniversaries by which, throughout time, human beings have kept their sorrows and their joys, their victories, their revelations and their obligations alive, for re-celebration and re-dedication another year, another decade, another century, another eon.