As if these premises be true, the distinct representation of continued action is refused to an art which cannot express even in a series of subjects, but by a supposed mental effort in the spectator's mind, the regular succession of their moments, it becomes evident, that instead of attempting to impress us by the indiscriminate usurpation of a principle out of its reach, it ought chiefly to rely for its effect on its great characteristics space and form, singly or in apposition. In forms alone the idea of existence can be rendered permanent. Sounds die, words perish or become obsolete and obscure, even colours fade, forms alone can neither be extinguished nor misconstrued; by application to their standard alone, description becomes intelligible and distinct. Thus the effectual idea of corporeal beauty can strictly exist only in the plastic arts: for as the notion of beauty arises from the pleasure we feel in the harmonious co-operation of the various parts of some favourite object to one end at once, it implies their immediate co-existence in the mass they compose; and therefore can be distinctly perceived and conveyed to the mind by the eye alone: hence the representation of form in figure is the _physical_ element of the Art. But as bodies exist in time as well as in space; as the pleasure arising from the mere symmetry of an object is as transient as it is immediate; as harmony of parts, if the body be the agent of an internal power, depends for its proof on their application, it follows, that the exclusive exhibition of inert and unemployed form, would be a mistake of the medium for the end, and that character or action is required to make it an interesting object of imitation. And this is the _moral_ element of the art. Those important moments then which exhibit the united exertion of form and character in a single object or in participation with collateral beings, _at once_, and which with equal rapidity and pregnancy give us a glimpse of the past and lead our eye to what follows, furnish the true materials of those technic powers, that select, direct, and fix the objects of imitation to their centre.