William James once said: "Progress is a terrible thing." It is more than that: it is also a highly ambiguous notion. For who knowsbut that a little further on the way a bridge may not have collapsed or a crevice split the earth?

All seemingly profound thinking which passes for realism, because it conveniently does away with all troublesome principles, has agreat attraction for the adolescent mind.

Revolution as an ideal concept always preserves the essential content of the original thought: sudden and lasting betterment.

Play is older than culture, for culture, however inadequately defined, always presupposes human society, and animals have not waited for man to teach them their playing.

What the study of history and artistic creation have in common is a mode of forming images.

You only live a short time... and you are dead a long time.

William James once said: "Progress is a terrible thing." It is more than that: it is also a highly ambiguous notion. For who knowsbut that a little further on the way a bridge may not have collapsed or a crevice split the earth?