This volume presents the new gospel of health, practical and physiological. It is the story of an evolution of natural law in the cure of disease for physicians and laymen, and discusses how the sick get well, how the well get sick and alcoholics are freshly considered. Of the two principal matters recommended as the practical outcome of the theory of health developed in this book, the first is that fasting, or the abstinence from food until natural hunger calls for it, is the best way to bring about recovery from disease. The second is that digestion is best promoted and food so assimilated as to afford the largest amount of nourishment and the greatest quantity of rich blood, by giving the stomach a long rest from all work during each twenty-four hours. That is to say that we shall be all the better by giving the stomach rest from the evening till the noon of the next day.