Read it through once

"There is that danger; and it is the critic's duty to prevent it. The critic's function is to supply a standard of taste. He must be stern as well as sympathetic. He must be the guardian of tradition. He must refuse to accept mere novelty for novelty's sake. He must insist that art shall be beautiful, and shall not sacrifice form to an idea. In a word, he must be the conservator of the temple of beauty."