In regard to the matter of diet. I do not want you to be hampered by "don'ts" and restrictions as to what you shall eat, but I do want you to eat with the thought in view that eating is to be governed by judgment and not by the pleasures of sense. Why do we eat? Not merely because the food tastes good. There is a better reason. We eat to live. We know that the food which we take into our bodies is digested, elaborated and assimilated--that is, made over into ourselves--and unless this digestion, elaboration and assimilation is properly conducted, we shall not be fully and completely nourished. Our body is made up of cells; the food which we eat is transformed into cell structure, and this new cell-material takes the place of the worn-out cells. Our reason would tell us that if too little material is furnished, cells will not be properly repaired and ill-health will follow. Our reason would tell us in the same way that if too much material is furnished, the machine will be clogged and the work will not be properly done. We will also understand at once that an irregular supply of new material would interfere with the elaboration of that which is undergoing the process of digestion and assimilation. We can see, too, that unless the various tissues receive the material which they can transform into themselves, they will not be fully repaired. If material is taken into the system which supplies no tissue with what it needs, this material becomes a source of irritation. These general rules borne in mind are sufficient to guide us into a wiser life than if we do not understand them; and, understanding these general principles, we will be anxious to study the particular rules which govern digestion and assimilation. I have known young women in college to be so absolutely ignorant or indifferent to physiological law as to be injuring themselves constantly by disobedience of such laws. I knew one girl, supposed to be a very fine student, and to have brought on "fits" by overstudy, while away at school. I had an opportunity to investigate the case, and I discovered that she had been eating from morning till night. She carried nuts, and candy, and apples in her pocket, had pickles and cake in her room, and studied and munched until it was no doubt a disturbed digestion, rather than an overused brain, that caused the "fits."