George Santayana,
The Life of Reason: The Phases of Human Progress
“ When we consider further the senseless rivalries, the vanities, the ignominy that reign in the “practical” world, how doubly blessed it becomes to find a sphere where limitation is an excellence, where diversity is a beauty, and where every man’s ambition is consistent with every other man’s and even favourable to it! It is indeed so in art; for we must not import into its blameless labours the bickerings and jealousies of criticism. Critics quarrel with other critics, and that is a part of philosophy. With an artist no sane man quarrels, any more than with the colour of a child’s eyes. ”

