Now let us speak of material healing. The science of medicine is still in a condition of infancy; it has not reached maturity. But when it has reached this point, cures will be performed by things which are not repulsive to the smell and taste of man—that is to say, by aliments, fruits and vegetables which are agreeable to the taste and have an agreeable smell. For the provoking cause of disease—that is to say, the cause of the entrance of disease into the human body—is either a physical one or is the effect of excitement of the nerves. But the principal causes of disease are physical, for the human body is composed of numerous elements, but in the measure of an especial equilibrium. As long as this equilibrium is maintained, man is preserved from disease; but if this essential balance, which is the pivot of the constitution, is disturbed, the constitution is disordered, and disease will supervene. For instance, there is a decrease in one of the constituent ingredients of the body of man, and in another there is an increase; so the proportion of the equilibrium is disturbed, and disease occurs. For example, one ingredient must be one thousand grams in weight, and another five grams, in order that the equilibrium be maintained. The part which is one thousand grams diminishes to seven hundred grams, and that which is five grams augments until the measure of the equilibrium is disturbed; then disease occurs. When by remedies and treatments the equilibrium is reestablished, the disease is banished. So if the sugar constituent increases, the health is impaired; and when the doctor forbids sweet and starchy foods, the sugar constituent diminishes, the equilibrium is reestablished, and the disease is driven off. Now the readjustment of these constituents of the human body is obtained by two means—either by medicines or by aliments; and when the constitution has recovered its equilibrium, disease is banished. All the elements that are combined in man exist also in vegetables; therefore, if one of the constituents which compose the body of man diminishes, and he partakes of foods in which there is much of that diminished constituent, then the equilibrium will be established, and a cure will be obtained. So long as the aim is the readjustment of the constituents of the body, it can be effected either by medicine or by food.