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

The modern city hardly knows a pure darkness or true silence anymore, nor does it know the effect of a single small light or that of a lonely distant shout.

Without metaphor the handling of general concepts such as culture and civilization becomes impossible, and that of disease and disorder is the obvious one for the case in point. Is not crisis itself a concept we owe to Hippocrates? In the social and cultural domain no metaphor is more apt than the pathological one.

Culture must have its ultimate aim in the metaphysical or it will cease to be culture.

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.

The more the specific feelings of being under obligation range themselves under a supreme principle of human dependence the clearer and more fertile will be the realization of the concept, indispensable to all true culture, of service; from the service of God down to the simple social relationship as between employer and employee.

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?