Reality, therefore, is to be found chiefly in the self-consciousness of the spiritual life; from this self-consciousness we build up our reality. Since spiritual requirement is from this point of view the measure of human undertaking, our activity is judged by the degree to which the state of the world is changed in it and has thus become our reality. How far our capacity reaches in this matter cannot be decided by preliminary consideration, but only by the progress of life itself: in particular it is not permissible to assume things-in-themselves independent of us and thus to reduce our world to a realm of mere appearances. For, so far as that independence reached, things could never enter our life, and never be inwardly appropriated; at most they could concern us only in their effects. As far as the conception of nature as a mechanism is concerned, which regards all occurrence as a texture of related individual points which exist, inaccessible, behind it, there is much to be said for the view that things are only known in their effects; but this view is an intolerable limitation--dogmatic in the highest degree--if it is meant to represent our fundamental relation to reality and to ourselves. For then we should be related to ourselves as to something alien; all the self-consciousness of life would be destroyed; there could be no development of being in contrast to single acts, but we must be completely resolved in the stream of appearances; there would be no advance in the striving after reality. As a matter of fact, we are concerned primarily with the content that life is able to give to itself; how far it presses forward to reality. Our world is to be measured more especially by the degree in which life becomes deepened. But from the beginning man, so far as he shares in the spiritual life, is not a being adjacent to reality, but within it. He would never be able to attain to a reality if he did not bear it within himself and needed only to develop it. Thus ultimately he does not look inwards from outside, but outwards from within; and his limitation is not the chief thing, but the secondary.