which receive their determinate existence through these specific arts. From another point of view, however, the particular arts have also themselves within them a process, a progression, independently of the art-types to which they attach an objective reality, a process which in this its more abstract relation is _common to all._ Every art possesses its spring-time of perfected elaboration as art, and on the one side or the other a history that precedes or follows this period of full-bloom. For the products of the arts collectively are spiritual products, and consequently are not at once to hand in their own specialized province respectively, as are the forms of Nature, but are subject to a beginning, progression, completion, and termination, a growth, a blooming, and a decay. These more abstract differences, whose devolution we propose at the very commencement of our inquiry briefly to indicate, since it asserts itself equally in all the arts, are identical with that which it is usual to define under the name of _rigorous_, _ideal_, and _approved_ style, when indicating the specific styles of art in each case, which are mainly related to the general mode of embodiment and representation, partly as considered in its external shape, and its possession or lack of spontaneity, its simplicity, its surfeit of detail, briefly in all its various aspects, according to which the definition of the content emerges in the external appearance; partly no less in its aspect of the technical elaboration of its sensuous material, in which the art in question gives determinate existence to its content.