Experience of the impotence of the spiritual life in relation to nature has been the cause of mental disquiet from early times. But this experience was not necessarily oppressive so long as mankind was called upon to transform nature into a realm of reason, and so long as there was hope of accomplishing this. For the contrast with the cold and rigid external world has deepened the inwardness of human relationship and made us conscious of the dignity and greatness of spiritual creation. In culture, humanity has formed a characteristic sphere of life, and in doing this has aided the spiritual life to attain a certain reality. In culture, spiritual factors and values win power; and a new order of life in contrast to that of nature is evolved. It cannot be doubted that a new reality makes its appearance; but it is an open question whether this new reality fulfils the hopes which have been placed upon it; and, further, whether perplexities and confusions, which make it doubtful whether anything has been gained, do not arise out of its further development. This question is certainly not answered lightly in the affirmative by the conviction that regards the spiritual life as a turning of reality towards its own truth, which therefore in its development must insist primarily on complete spontaneity and independence. For, if in culture the spiritual life attains an independence over against nature, it is at the same time drawn so deeply into the particularity and limitation of human life, and is associated so much with the merely human, that culture as a whole is anything but the unfolding of a realm of pure, or even of only preponderating, spirituality. In the first place, the spiritual life does not introduce a definite and fixed content into our experience, and it does not follow paths independent of human striving and error; but arises through hard toil and only slowly finds any unity: in its further endeavour it by no means follows the same tendency, but effects great changes, indeed revolutions, into states the exact opposite of its previous states. When it is so uncertain as to its own aim the spiritual life becomes seriously involved in the seeking and vacillation, in the needs and passions, of man: instead of giving to man an immovable support and pointing out a definite aim for his activity, it seems itself unable to pass beyond a state of uncertain groping and error.