You see also, by this interesting and most memorable passage, how completely the question is admitted to be one of ethics--the only real point at issue being, whether this face or that is developed on the truer moral principle. 140. I assume, however, for the present, that this Apolline type is the kind of form you wish to reach and to represent. And now observe, instantly, the whole question of manner of imitation is altered for us. The fins of the fish, the plumes of the swan, and the flowing of the Sun-God's hair are all represented by incisions--but the incisions do sufficiently represent the fin and feather,--they _in_sufficiently represent the hair. If I chose, with a little more care and labor, I could absolutely get the surface of the scales and spines of the fish, and the expression of its mouth; but no quantity of labor would obtain the real surface of a tress of Apollo's hair, and the full expression of his mouth. So that we are compelled at once to call the imagination to help us, and say to it, _You_ know what the Apollo Chrysocomes must be like; finish all this for yourself. Now, the law under which imagination works, is just that of other good workers. "You must give me clear orders; show me what I have to do, and where I am to begin, and let me alone." And the orders can be given, quite clearly, up to a certain point, in form; but they cannot be given clearly in color, now that the subject is subtle. All beauty of this high kind depends on harmony; let but the slightest discord come into it, and the finer the thing is, the more fatal will be the flaw. Now, on a flat surface, I can command my color to be precisely what and where I mean it to be; on a round one I cannot. For all harmony depends, first, on the fixed proportion of the color of the light to that of the relative shadow; and therefore if I fasten my color, I must fasten my shade. But on a round surface the shadow changes at every hour of the day; and therefore all coloring which is expressive of form, is impossible; and if the form is fine, (and here there is nothing but what is fine,) you may bid farewell to color.