in the same way carried out of the sphere of that which is external to ourselves, and at once asserts there the presence of something over and above that which is expressed by our ordinary consciousness, which in its general use treats the time-divisions of tones with indifference or caprice. A uniformity of similar character, if not so consistently defined, may be traced still further, and is involved in the living content of poetry itself, although the relation here is quite an external one. By this we mean that in an epic poem or a drama, both of which have their particular subdivisions, cantos, or acts, whatever may be the specific term applicable, there is an approximate principle of equality apparent in the division of subject-matter. And the same characteristic is generally true in the grouping of the subject in pictures, although such should not appear to be a necessary result of the nature of the subject-matter itself, nor create the impression that this uniform distribution is due to any controlling principle of first importance. Conformity to rule and symmetry, which are the abstract unity and definition of all that is essentially spatial and its configuration no less than of all which is external under temporal condition, are mainly the co-ordinating principles of quantity and size, as we have already noticed in our consideration of the beauty of Nature. All that which does not, in virtue of its own specific medium[373], strictly form part of external extension, is consequently freed from the range of those principles which assert themselves exclusively in the relations of quantity, and are determined through relations of deeper significance, and the unity which co-ordinates them. It follows from this that the further art embraces subject-matter which is independent of the external condition, so much the less significant the principle of uniformity becomes, in the co-ordination of that art's subject-matter and the more completely is it restricted to a subordinate position.