Pray, do not leave this room without a perfectly clear holding of these three ideas. You may try them, and toss them about afterwards, as much as you like, to see if they'll bear shaking; but do let me put them well and plainly into your possession. Attach them to three works of art which you all have either seen or continually heard of. There's the (so-called) "Theseus" of the Elgin marbles. That represents the whole end and aim of the Athenian school--the natural form of the human body. All their conventional architecture--their graceful shaping and painting of pottery--whatsoever other art they practised--was dependent for its greatness on this sheet-anchor of central aim: true shape of living man. Then take, for your type of the Italian school, Raphael's "Disputa del Sacramento;" that will be an accepted type by everybody, and will involve no possibly questionable points: the Germans will admit it; the English academicians will admit it; and the English purists and pre-Raphaelites will admit it. Well, there you have the truth of human expression proposed as an aim. That is the way people look when they feel this or that--when they have this or that other mental character: are they devotional, thoughtful, affectionate, indignant, or inspired? are they prophets, saints, priests, or kings? then--whatsoever is truly thoughtful, affectionate, prophetic, priestly, kingly--_that_ the Florentine school tried to discern, and show; _that_ they have discerned and shown; and all their greatness is first fastened in their aim at this central truth--the open expression of the living human soul. Lastly, take Veronese's "Marriage in Cana" in the Louvre. There you have the most perfect representation possible of colour, and light, and shade, as they affect the external aspect of the human form, and its immediate accessories, architecture, furniture, and dress. This external aspect of noblest nature was the first aim of the Venetians, and all their greatness depended on their resolution to achieve, and their patience in achieving it.