There is an aspect of nature which is still more interesting, and to see it the mystic need not go away, for he sees it in the midst of the world. What is it? It is to read human nature and to watch its continual change, its progress, its degradation, its improvement. It is so interesting that in spite of all the difficulties that the world presents, one feels life worth living when one begins to notice how those who were going forward begin to go backward, and how those who were going backward begin to go forward; when one observes how a person, without sinking in the water, is drowned in life, and how a person who was drowning begins to swim and is saved; when one sees how from the top a person comes down to the bottom in a moment, and how a person who was creeping on the ground has at last arrived at the top; when one sees how friends turn into bitter enemies, and how bitter enemies one day become friends. To one who observes human nature keenly it gives such an interest in life that he becomes sufficiently strong to bear all, to endure all, to stand all things patiently. One may observe this moving picture all through life, and it is never enough; one never tires of it.