"Man is not by any means of fixed and enduring form (this, in spite of suspicious to the contrary on the part of their wise men, was the ideal of the ancients). He is much more an experiment and a transition. He is nothing else than the narrow and perilous bridge between nature and spirit. His innermost destiny drives him on to the spirit and to God. His innermost longing draws him back to nature, and the mother. Between the two forces his life hangs tremulous and resolute."