Here, then, are the three greatest schools of the former world exemplified for you in three well-known works. The Phidian "Theseus" represents the Greek school pursuing truth of form; the "Disputa" of Raphael, the Florentine school pursuing truth of mental expression; the "Marriage in Cana," the Venetian school pursuing truth of colour and light. But do not suppose that the law which I am stating to you--the great law of art-life--can only be seen in these, the most powerful of all art schools. It is just as manifest in each and every school that ever has had life in it at all. Wheresoever the search after truth begins, there life begins; wheresoever that search ceases, there life ceases. As long as a school of art holds any chain of natural facts, trying to discover more of them and express them better daily, it may play hither and thither as it likes on this side of the chain or that; it may design grotesques and conventionalisms, build the simplest buildings, serve the most practical utilities, yet all it does will be gloriously designed and gloriously done; but let it once quit hold of the chain of natural fact, cease to pursue that as the clue to its work; let it propose to itself any other end than preaching this living word, and think first of showing its own skill or its own fancy, and from that hour its fall is precipitate--its destruction sure; nothing that it does or designs will ever have life or loveliness in it more; its hour has come, and there is no work, nor device, nor knowledge, nor wisdom in the grave whither it goeth. Let us take for example that school of art over which many of you would perhaps think this law had but little power--the school of Gothic architecture. Many of us may have been in the habit of thinking of that school rather as of one of forms than of facts--a school of pinnacles, and buttresses, and conventional mouldings, and disguise of nature by monstrous imaginings--not a school of truth at all. I think I shall be able, even in the little time we have to-night, to show that this is not so; and that our great law holds just as good at Amiens and Salisbury, as it does at Athens and Florence. I will go back then first to the very beginnings of Gothic art, and before you, the students of Kensington, as an impanelled jury, I will bring two examples of the barbarism out of which Gothic art emerges, approximately contemporary in date and parallel in executive skill; but, the one, a barbarism that did not get on, and could not get on; the other, a barbarism that could get on, and did get on; and you, the impanelled jury, shall judge what is the essential difference between the two barbarisms, and decide for yourselves what is the seed of life in the one, and the sign of death in the other.