"As one grows older, either constant improvement or deterioration takes place. There is no standing still in life; life is motion, and one cannot stand still and yet remain in motion. The very forces which keep you alive depend upon activity. We sometimes hear persons speak of preserving their present condition, physically, but in reality there is nothing you can do to preserve a certain degree of health, strength or development. When such a condition is apparently taking place, it is necessary to strive constantly to improve in order to hold a certain standard; otherwise you are really...