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.

Between friends there is no bribery. ... the relationship of friends is intrinsically fair and equal. Neither feels stronger or more clever or more beautiful than the other.

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.

Children must be taught how to think, not what to think.

The closest friends I made all through life have been people who also grew up close to a loved and loving grandmother or grandfather.

For the human species to evolve, the conversation must deepen.

The prophet who fails to present a bearable alternative and yet preaches doom is part of the trap that he postulates. Not only does he picture us caught in a tremendous man-made or God-made trap from which there is no escape, but we must also listen to him day in, day out, describe how the trap is inexorably closing. To such prophecies the human race, as presently bred and educated and situated, is incapable of listening. So some dance and some immolate themselves as human torches; some take drugs and some artists spill their creativity in sets of randomly placed dots on a white ground.