§ 16. I will not entangle the reader in the very subtle and curious variations of the laws in this matter. The simple fact which is _necessary_ for him to observe is, that the paler and purer the color, the more the great Venetian colorists will reinforce it in the shadow, and allow it to fall or rise in sympathy with the light; and those especially whose object it is to represent sunshine, nearly always reinforce their local colors somewhat in the shadows, and keep them both fainter and feebler in the light, so that they thus approach a condition of universal glow, the full color being used for the shadow, and a delicate and somewhat subdued hue of it for the light. And this to the eye is the loveliest possible condition of color. Perhaps few people have ever asked themselves why they admire a rose so much more than all other flowers. If they consider, they will find, first, that red is, in a delicately gradated state, the loveliest of all pure colors; and secondly, that in the rose there is _no shadow_, except what is composed of color. All its shadows are fuller in color than its lights, owing to the translucency and reflective power of its leaves.
The second shaft, 6, in which the local color is paler towards the light, and reinforced in the shadow, will therefore represent the Venetian system with respect to paler colors, and the system, for the most part, even with respect to darker colors, of painters who attempt to render effects of strong sunlight. Generally, therefore, it represents the practice of Turner. The first shaft, 5, exhibits the disadvantage of the practice of Rembrandt and Leonardo, in that they cannot show the local color on the dark side, since, however energetic, it must at last sink into their exaggerated darkness.
§ 17. Now, from all the preceding inquiry, the reader must perceive more and more distinctly the great truth, that all forms of right art consist in a certain _choice_ made between various classes of truths, a few only being represented, and others necessarily excluded; and that the excellence of each style depends first on its consistency with itself,--the perfect fidelity, as far as possible, to the truths it has chosen; and secondly, on the breadth of its harmony, or number of truths it has been able to reconcile, and the consciousness with which the truths refused are acknowledged, even though they may not be represented. A great artist is just like a wise and hospitable man with a small house: the large companies of truths, like guests, are waiting his invitation; he wisely chooses from among this crowd the guests who will be happiest with each other, making those whom he receives thoroughly comfortable, and kindly remembering even those whom he excludes; while the foolish host, trying to receive all, leaves a large part of his company on the staircase, without even knowing who is there, and destroys, by inconsistent fellowship, the pleasure of those who gain entrance.