What is health? Health is order. And what is order? Order is music. Where there is rhythm, regularity, cooperation, there is harmony and sympathy; and therefore health of mind and health of body depend upon preserving that harmony and keeping intact that sympathy which exist in the mind and in the body. Life in the world, and especially if lived among the crowd, tests and tries our patience every moment of the day; and it is most difficult to preserve that harmony and peace which are at the root of all happiness. Life means struggle with friends and battle with foes; it is all the time giving and taking; and it is very difficult to keep the sympathy and harmony which give health and happiness.