The processes of digestion and assimilation are under the supervision and control of an inner division of man's mentality, which is generally called the sub-conscious mind; and I shall use that term here in order to be understood. The sub-conscious mind is in charge of all the functions and processes of life; and when more food is needed by the body, it makes the fact known by causing a sensation called hunger. Whenever food is needed, and can be used, there is hunger; and whenever there is hunger it is time to eat. When there is no hunger it is unnatural and wrong to eat, no matter how great may APPEAR to be the need for food. Even if you are in a condition of apparent starvation, with great emaciation, if there is no hunger you may know that FOOD CANNOT BE USED, and it will be unnatural and wrong for you to eat. Though you have not eaten for days, weeks, or months, if you have no hunger you may be perfectly sure that food cannot be used, and will probably not be used if taken. Whenever food is needed, if there is power to digest and assimilate it, so that it can be normally used, the sub-conscious mind will announce the fact by a decided hunger. Food, taken when there is no hunger, will sometimes be digested and assimilated, because Nature makes a special effort to perform the task which is thrust upon her against her will; but if food be habitually taken when there is no hunger, the digestive power is at last destroyed, and numberless evils caused. If the foregoing be true--and it is indisputably so--it is a self-evident proposition that the natural time, and the healthy time, to eat is when one is hungry; and that it is never a natural or a healthy action to eat when one is not hungry. You see, then, that it is an easy matter to scientifically settle the question when to eat. ALWAYS eat when you are hungry; and NEVER eat when you are not hungry. This is obedience to nature, which is obedience to God. We must not fail, however, to make clear the distinction between hunger and appetite. Hunger is the call of the sub-conscious mind for more material to be used in repairing and renewing the body, and in keeping up the internal heat; and hunger is never felt unless there is need for more material, and unless there is power to digest it when taken into the stomach. Appetite is a desire for the gratification of sensation. The drunkard has an appetite for liquor, but he cannot have a hunger for it. A normally fed person cannot have a hunger for candy or sweets; the desire for these things is an appetite. You cannot hunger for tea, coffee, spiced foods, or for the various taste-tempting devices of the skilled cook; if you desire these things, it is with appetite, not with hunger. Hunger is nature's call for material to be used in building new cells, and nature never calls for anything which may not be legitimately used for this purpose.