If you look from some distance at these two engravings of Greek coins, (place the book open, so that you can see the opposite plate three or four yards off,) you will find the relief on each of them simplifies itself into a pearl-like portion of a sphere, with exquisitely gradated light on its surface. When you look at them nearer, you will see that each smaller portion into which they are divided--cheek, or brow, or leaf, or tress of hair--resolves itself also into a rounded or undulated surface, pleasant by gradation of light. Every several surface is delightful in itself, as a shell, or a tuft of rounded moss, or the bossy masses of distant forest would be. That these intricately modulated masses present some resemblance to a girl's face, such as the Syracusans imagined that of the water-goddess Arethusa, is entirely a secondary matter; the primary condition is that the masses shall be beautifully rounded, and disposed with due discretion and order. 22. (2.) It is difficult for you, at first, to feel this order and beauty of surface, apart from the imitation. But you can see there is a pretty disposition of, and relation between, the projections of a fir-cone, though the studded spiral imitates nothing. Order exactly the same in kind, only much more complex; and an abstract beauty of surface rendered definite by increase and decline of light--(for every curve of surface has its own luminous law, and the light and shade on a parabolic solid differs, specifically, from that on an elliptical or spherical one)--it is the essential business of the sculptor to obtain; as it is the essential business of a painter to get good color, whether he imitates anything or not. At a distance from the picture, or carving, where the things represented become absolutely unintelligible, we must yet be able to say, at a glance, "That is good painting, or good carving."