The Roman was perhaps the first to separate beauty from use, and to pursue it as ornament merely. He built his grand edifice,--its piers, its vaults, its walls of brick and concrete,--and then gave it a marble envelope copied from the Greek architecture. The latter could be stripped away, as in many cases it was by the hand of time, and leave the essentials of the structure nearly complete. Not so with the Greek: he did not seek the beautiful, he was beauty; his building had no ornament, it was all structure; in its beauty was the flower of necessity, the charm of inborn fitness and proportion. In other words, "his art was structure refined into beautiful forms, not beautiful forms superimposed upon structure," as with the Roman. And it is in Greek mythology, is it not, that Beauty is represented as riding upon the back of a lion? as she assuredly always does in their poetry and art,--rides upon power, or terror, or savage fate; not only rides upon, but is wedded and incorporated with it; hence the athletic desire and refreshment her coming imparts. This is the invariable order of nature. Beauty without a rank material basis enfeebles. The world is not thus made; man is not thus begotten and nourished. It comes to me there is something implied or understood when we look upon a beautiful object, that has quite as much to do with the impression made upon the mind as anything in the object itself; perhaps more. There is somehow an immense and undefined background of vast and unconscionable energy, as of earthquakes, and ocean storms, and cleft mountains, across which things of beauty play, and to which they constantly defer; and when this background is wanting, as it is in much current poetry, beauty sickens and dies, or at most has only a feeble existence. Nature does nothing merely for beauty; beauty follows as the inevitable result; and the final impression of health and finish which her works make upon the mind is owing as much to those things which are not technically called beautiful as to those which are. The former give identity to the latter. The one is to the other what substance is to form, or bone to flesh. The beauty of nature includes all that is called beautiful, as its flower; and all that is not called beautiful, as its stalk and roots.