Art is simultaneously particular and general. This is a real dichotomy. The great thing about proportion, one aspect of art, is that it is both extremes at once. The level of quality of a work can usually be established by the extent of the polarity between its generality and particularity. Or, to state the idea a little too simply, the better the work, the more diverse its aspects. The nature of the general aspects and the particular ones changes from artist to artist and especially from time to time, since the changes are due to broad changes in philosophy. This change is the essential change in art, determining its purpose and appearance

p. 177 - "Art and Architecture," 1987