Just as there are bad habits of eating too little that are dangerous and must be corrected by the will so there are bad habits of eating too much that can only be corrected in the same way. While it is dangerous to be under weight in the early years of life, it is at least as dangerous to be overweight in middle life. With the variety and abundance of food now supplied at a great many tables, it is comparatively easy for people in our time to eat too much. The result is that among the better-to-do classes a great many people suffer from obesity, sometimes to such an extent that life is made a burden to them. There is only one way to correct this and that is to eat less and of course to exercise more. Reduction in diet means the breaking of a long established habit and that of course is often hard. The whole family may have to set a good example of abstinence from too great a variety of food and especially from the richer foods, in order that a parent may be helped to prevent further development of obesity and to lose gently and gradually some of the overweight that is being put on, and which now, by conserving heat and slowing up metabolism {163} generally within the body, makes it so easy for even reduced quantities of food to maintain the former habit of adding weight. In this matter of obesity, however, just exactly as in the case of tuberculosis for those who are underweight, prevention is much better than cure. The people who know that they inherit such tendencies should be particularly careful not to form habits of eating that will add considerably to their weight. After all, it is not nearly so difficult a matter as is often imagined. There is no need, unless in very exceptional cases, of denying one's self anything that is liked in the ordinary foods, only less of each article must be eaten. Even desserts need not be entirely eliminated, for ices may be taken instead of ice cream; sour fruits and especially those of the citrus variety--oranges and grapefruit--and the gelatine desserts may be eaten almost with impunity. The phrase "eat and grow thin" has deservedly become popular in recent years because as a matter of fact it is perfectly possible to eat heartily and above all to satisfaction without putting on weight. It is, of course, harder to lose weight, but even that may be accomplished gradually under proper direction if there is the persistent will to do it. {164}