Still further, nothing is so exhausting as this self-seeking effort. The passion which it develops is like an access of fever which burns away one’s vitality. The strength of health, on the other hand, renews itself through self-forgetting work; and thrives on unselfish service done for worthy ends. Only in such service are other people sincerely inclined to help. Thus it happens that some people, though they work hard and never retire to the health-resorts, still live to a robust old age, while other people spend half the year or perhaps the whole of it at the baths and remain without rest. The many nervous diseases of our time are for the most part caused by the self-centred life, and their real cure must be through a renewal in health of mind and will. III. As to von Klinger’s third suggestion, it is to be said that the inclination to solitude is absolutely necessary not only for happiness, but for the tranquil development of one’s spiritual life. The happiness which can really be attained, and which is independent of all changes, is to be found in a life given to great thoughts and in a work peacefully directed toward great ends. Such a life is, however, necessarily withdrawn from fruitless sociability. As Goethe says, “To such a life, all else is vanity and illusion.” It is by such a course of life that one by degrees escapes from the fickleness and moodiness of life. He learns not to take people too seriously. He comes to regard with tranquillity the shifting changes of opinions and inclinations. So far as his inclination goes and his duties permit, he would rather shun popularity than seek it. IV. As to the last of von Klinger’s paragraphs, it may be said to contain the philosophy of his life. Looking at people as individuals, their lives appear full of contrasts; but taking them all together, their lives are in fact much alike. One section of humanity, of high and of low estate, lives either consciously or unconsciously a merely animal life. Such persons simply follow the path which their physical nature indicates, fulfilling their little span of life, and knowing no other destiny. Another group is ever seeking some escape from this unsatisfying end of life. Dante, in the first canto of his Divine Comedy, very beautifully describes these seekers for the better life; and this search makes in reality the spiritual experience of all great personalities.