As to what he shall eat, man must be guided by that Intelligence which has arranged that the people of any given portion of the earth's surface must live on the staple products of the zone which they inhabit. Have faith in God, and ignore "food science" of every kind. Do not pay the slightest attention to the controversies as to the relative merits of cooked and raw foods; of vegetables and meats; or as to your need for carbohydrates and proteins. Eat only when you have an earned hunger, and then take the common foods of the masses of the people in the zone in which you live, and have perfect confidence that the results will be good. They will be. Do not seek for luxuries, or for things imported or fixed up to tempt the taste; stick to the plain solids; and when these do not "taste good," fast until they do. Do not seek for "light" foods; for easily digestible, or "healthy" foods; eat what the farmers and workingmen eat. Then you will be functioning in a perfectly healthy manner, so far as what to eat is concerned. I repeat, if you have no hunger or taste for the plain foods, do not eat at all; wait until hunger comes. Go without eating until the plainest food tastes good to you; and then begin your meal with what you like best.
In deciding how to eat, man must be guided by reason. We can see that the abnormal states of hurry and worry produced by wrong thinking about business and similar things have led us to form the habit of eating too fast, and chewing too little. Reason tells us that food should be chewed, and that the more thoroughly it is chewed the better it is prepared for the chemistry of digestion. Furthermore, we can see that the man who eats slowly and chews his food to a liquid, keeping his mind on the process and giving it his undivided attention, will enjoy more of the pleasure of taste than he who bolts his food with his mind on something else. To eat in a perfectly healthy manner, man must concentrate his attention on the act, with cheerful enjoyment and confidence; he must taste his food, and he must reduce each mouthful to a liquid before swallowing it. The foregoing instructions, if followed, make the function of eating completely perfect; nothing can be added as to what, when, and how.