Vitruvius, the ancient architect, whom the Romans employed upon great buildings, says that whosoever desires to build should study the perfection of the human figure, for in it are discovered the most secret mysteries of proportion. So, before I say anything about architecture, I will state how a well-formed man should be made, and then about a woman, a child and a horse. Any object may be proportioned out (_literally_, measured) in a similar way. Therefore, hear first of all what Vitruvius says about the human figure, which he learnt from the greatest masters, painters and founders, who were highly famed. They said that the human figure is as follows. That the face from the chin upward to where the hair begins is the tenth part of a man, and that an out-stretched hand is the same length, &c. [Illustration: "This is my appearance in the eighteenth year of my age" Charcoal-drawing in the Academy, Vienna _Face p._288] And again in another place, as Sir Martin Conway points out, he gives a religious basis to this notion,[85] "the Creator fashioned men once for all as they must be, and I hold that the perfection of form and beauty is contained in the sum of all men." In an obvious sense these passages certainly run counter to those which I have quoted (pp. 285-207): but I would like to point out that these are dogmatic assertions about something that if it were true could never be proved by experience (see also pp. 64, 254), those former are Dürer's advice with a view to practice. Men frequently carry about a considerable amount of dogmatic opinion, which has so little connection with actual experience that it is never brought to the test without being noticeably incommoded by it. Yet it is not absolutely necessary to consider Dürer as inconsistent in regard to this matter, even to this degree. The beauty of form which he held had been Adam's, and which was now parcelled out among his vast progeny in various amounts as a consequence of his fall--this beauty of form doubtless Dürer considered it part of an artist's business to recollect and reveal in his work. This beauty is an ideal, and his canon (or rather canons) were intended as means to help the artist to approach towards the realisation of that ideal. It is obvious also that a man occupied in comparing the proportions of those whom he considers to be exceptionally beautiful will develop and feed his power of imagining beautifully proportioned figures. It would be futile to deny that this is very much what took place in the evolution of Greek statues, or that such works are perhaps of all others the most central and satisfying to the human spirit. The sentences that precede that quoted by Sir Martin are Greek in tendency.