text:  "When a young artist is first told that his composition and his attitudes must be contrasted; that he must turn the head contrary to the position of the body in order to produce grace and animation; that his outline must be undulating and swelling to give grandeur; and that the eye must be gratified with a variety of colours; when he is told this with certain animating words of spirit dignity energy greatness of style and brilliancy of tints he becomes suddenly vain of his newly-acquired knowledge and never thinks he can carry those rules too far