§ 8. Similar consequences, as to the phenomenal character of space and time, follow from the consideration of the familiar Kantian antinomies founded upon the concept of spatial and temporal infinity. Space and time must be externally boundless and internally indefinitely divisible, and yet again cannot be either. Freed from unessential accessories, the argument for either side of the antinomy may be stated thus. Space and time must be boundless because all spatial and temporal existence means spatial and temporal relation to a second term, itself similarly related to a third term. For precisely the same reason both must be indefinitely divisible. Yet again, they can be neither, since only the individual exists, and within such an interminable network of relations between terms which are nothing but the supporters of these relations there is no principle of individual structure.[153] Thus the Kantian antinomies are a simple consequence of the old difficulty about quality and relation. Space and time must be mere relations, and the terms of those relations therefore qualitatively indistinguishable; again, since they are relations they cannot be relations between nothings or, what is the same thing, between terms with no individual character. As in all cases where the problem of relation and quality arises, it then conducts us to the indefinite regress. So long as we continue to look upon space and time as real, we have therefore to choose between two equally illogical alternatives. We must either arbitrarily refuse to continue the indefinite regress beyond the point at which its difficulties become apparent, as is done by the assertion that space and time have finite bounds or indivisible parts, or we must hold that the absolute experience actually achieves the summation of an unending series. With the recognition that space and time are phenomenal, the result of a process of construction forced on us by our practical needs, but not adequately corresponding to the real nature of individual existence, the difficulty disappears. Both sides of the antinomy become relatively true, in the sense that for our practical purposes we must be content to adopt now the one and again the other; both become ultimately untrue in the sense that space and time, being constructions of our own, are _really_ neither finite nor infinite series, but are the one or the other according to the purposes for which we use our construction.