In ninety-nine cases out of a hundred twelve o'clock, noon, is early enough; and it is generally the most convenient time. If you are doing heavy work, you will get by noon a hunger sufficient to justify a good-sized meal; and if your work is light, you will probably still have hunger enough for a moderate meal. The best general rule or law that can be laid down is that you should eat your first meal of the day at noon, if you are hungry; and if you are not hungry, wait until you become so. And when shall I eat my second meal? Not at all, unless you are hungry for it; and that with a genuine earned hunger. If you do get hungry for a second meal, eat at the most convenient time; but do not eat until you have a really earned hunger. The reader who wishes to fully inform himself as to the reasons for this way of arranging the mealtimes will find the best books thereon cited in the preface to this work. From the foregoing, however, you can easily see that the Science of Being Well readily answers the question: When, and how often shall I eat? The answer is: Eat when you have an earned hunger; and never eat at any other time. CHAPTER X. WHAT TO EAT. The current sciences of medicine and hygiene have made no progress toward answering the question, What shall I eat? The contests between the vegetarians and the meat eaters, the cooked food advocates, raw food advocates, and various other "schools" of theorists, seem to be interminable; and from the mountains of evidence and argument piled up for and against each special theory, it is plain that if we depend on these scientists we shall never know what is the natural food of man. Turning away from the whole controversy, then, we will ask the question of nature herself, and we shall find that she has not left us without an answer. Most of the errors of dietary scientists grow out of a false premise as to the natural state of man. It is assumed that civilization and mental development are unnatural things; that the man who lives in a modern house, in city or country, and who works in modern trade or industry for his living is leading an unnatural life, and is in an unnatural environment; that the only "natural" man is a naked savage, and that the farther we get from the savage the farther we are from nature. This is wrong. The man who has all that art and science can give him is leading the most natural life, because he is living most completely in all his faculties. The dweller in a well-appointed city flat, with modern conveniences and good ventilation, is living a far more naturally human life than the Australian savage who lives in a hollow tree or a hole in the ground.