The ups and downs of this cosmos may sometimes be acknowledged to be metaphorical ups and downs, but until about Newton's time most people took the "up" of heaven and the "down" of hell to be more or less descriptive.

We do not live in a centred space any more, but have to create our own centres.

Work, as we usually think of it, is energy expended for a further end in view; play is energy expended for its own sake, as with children's play, or as manifestation of the end or goal of work, as in "playing" chess or the piano. Play in this sense, then, is the fulfillment of work, the exhibition of what the work has been done for.

Physics is an organized body of knowledge about nature, and a student of it says that he is learning physics, not nature. Art, like nature, has to be distinguished from the systematic study of it, which is criticism.

Nature is inside art as its content, not outside as its model.

The human landscape of the New World shows a conquest of nature by an intelligence that does not love it.

Real unity tolerates dissent and rejoices in variety of outlook and tradition, recognizes that it is man's destiny to unite and not divide, and understands that creating proletariats and scapegoats and second-class citizens is a mean and contemptible activity.