My purpose in writing this treatise is to establish, if this be found possible, a foundation for the belief that the art of the painter and sculptor is imitative, not creative; that the great masterpieces of art which have withstood the test of time rest firmly upon the supreme expression of character and beauty as these qualities are revealed in man and nature; that it is the mission of art to reveal and make plain these rare and lovely qualities. The truthful representation of these qualities constitutes a common factor which binds all great works together, a fact that is realized in every national gallery of art.
