Without beginning this discipline of the muscular equipment at the right point and in the right manner, no solid structure of Efficiency-Building can be secured. Any amount of indigestion, or unnecessary strain put upon metabolism, interferes with the smooth working of the organism in the same way that an infinitesimal weight put at the tip end of the long arm of a lever multiplies the burden of resistance at the short end many, many fold. Therefore, the Crux of Fletcherism is found in first training the muscular and mental apparatus to proceed with thorough deliberation relative to every thing taken into the body; for from this intake, and especially from the manner of the handling of this material along the line of the alimentary canal, come efficiency or inefficiency. It is first necessary to know what you want the muscles to habituate themselves to doing in connection with nutrition. They must learn to know what constitutes a true appetite, in contradistinction to indefiniteness of want or desire. The muscles will soon learn to know that real hunger (body need) is not expressed by any uncomfortable feelings below the guillotine line. Only in the head, where the senses are all bunched together for the most important team-work, is honest hunger sensed. We may rightly add to the list of the senses, Appetite, and trust it with confidence to tell us what the body can use to advantage of the foods available at the time. That the foods are appetizing is the only recommendation necessary to a set of muscles trained to treat them as Nature requires when they enter the laboratory of the mouth. Connected with the training of the mouth-muscle outfit, there is the one standing order. Challenge everything applying for entrance, whether by special invitation or in the way of surprise, by testing it for taste-acceptability at the tip of the tongue. Then keep on tasting and testing, with reverential appreciation of the gustatory delight there is in it, in the full knowledge that both digestion and assimilation, which are the prime necessities of nutrition, are healthfully stimulated by accentuated enjoyment. It is not necessary to dwell intensively on sensual enjoyment of the material being automatically handled by the methodical muscles. The pleasant sense sensations surrounding taste may serve as an accompaniment to agreeable conversation, to the delight of beauty in any form, to flowers, to music, to graceful and vivacious femininity, or to any sort of charm, with added strength given to the effect on wholesome nutrition.