There is another, and a very large class, of cases among women of leisure who have suffered all their lives from a lack of a vocation; they have nothing to think of except themselves. They do not know what it is to be quite well; they travel from one part of the country to another, and from one country to another, but they never rise above a certain level of invalidism. They are self centered, and what they need is the work cure. In the majority of cases, before these patients can be restored to health, powerful habits must be eradicated, new interests in others must be supplied to supplant the most intense egotism, new paths must be hewn out in the brain, the will must be recreated, and character can only be imparted by those who possess it. CHAPTER VII THE HYGIENE OF THE MIND AND ITS RELATION TO THE PHYSICAL HEALTH Heredity; Temperament; Social Instincts; Fear. Mental Development; Self-control, the Moral Sense, the Religions Instincts; the Advantages of College Life; Balance of the Mental Faculties; the Effects of the Higher Education of Women. The Environment; the Choice of Friends; Literature. The Power of the Will or Inhibition; the Effect of the Mental Attitude on the Physical Health; A Definite Occupation a Physical Necessity; the Psychology of Success. The solidarity of brain and mind is an axiom of modern medicine, and it is a fundamental principle that must be kept constantly in view in all physical and mental training. Hitherto unsoundness, inefficiency, and weakness of mind have only been lightly touched upon in preventive medicine, but the importance of the mind as the chief factor in health and disease is so paramount that it can no longer be ignored. The problems that present themselves to the mother and the educator to-day are practically the same, and the mother is one of the most potent educators that we have—how the mind can best be strengthened, broadened, and be made the most efficient working instrument possible through the application of modern scientific and physiologic knowledge. These are questions of vital importance to the human race. =Heredity.=—Holmes says: “Each one of us is only the footing up of a double column of figures that goes back to the first pair. Every unit tells, and some of them are plus and some of them are minus. We are mainly nothing but the answer to a long sum in addition and subtraction. Slight obliquities are what we most have to do with in education.” There are certain hereditary predispositions that will develop under certain conditions; some of them are good, some are evil; that is, with the natural development of the mind, certain peculiarities of the ancestors will be reproduced. The problems suggested are how the mind can best be developed, educated, and trained, so that hereditary weaknesses may be counteracted or held in abeyance, and that latent hereditary talents may be discovered and developed.