For example, the starch component must be present to a given amount, and the sugar to a given amount. So long as each remaineth in its natural proportion to the whole, there will be no cause for the onset of disease. When, however, these constituents vary as to their natural and due amounts--that is, when they are augmented or diminished--it is certain that this will provide for the inroads of disease.

This question requireth the most careful investigation. The Báb hath said that the people of Bahá must develop the science of medicine to such a high degree that they will heal illnesses by means of foods. The basic reason for this is that if, in some component substance of the human body, an imbalance should occur, altering its correct, relative proportion to the whole, this fact will inevitably result in the onset of disease. If, for example, the starch component should be unduly augmented, or the sugar component decreased, an illness will take control. It is the function of a skilled physician to determine which constituent of his patient's body hath suffered diminution, which hath been augmented. Once he hath discovered this, he must prescribe a food containing the diminished element in considerable amounts, to re-establish the body's essential equilibrium. The patient, once his constitution is again in balance, will be rid of his disease.

This question requireth the most careful investigation. When highly-skilled physicians shall fully examine this matter, thoroughly and perseveringly, it will be clearly seen that the incursion of disease is due to a disturbance in the relative amounts of the body's component substances, and that treatment consisteth in adjusting these relative amounts, and that this can be apprehended and made possible by means of foods."

Illnesses which occur by reason of physical causes should be treated by doctors with medical remedies; those which are due to spiritual causes disappear through spiritual means. Thus an illness caused by affliction, fear, nervous impressions, will be healed more effectively by spiritual rather than by physical treatment. Hence, both kinds of treatment should be followed; they are not contradictory. Therefore thou shouldst also accept physical remedies inasmuch as these too have come from the mercy and favor of God, Who hath revealed and made manifest medical science so that His servants may profit from this kind of treatment also. Thou shouldst give equal attention to spiritual treatments, for they produce marvelous effects.

Now, if thou wishest to know the true remedy which will heal man from all sickness and will give him the health of the divine kingdom, know that it is the precepts and teachings of God. Focus thine attention upon them."

Of the two kinds of material healing, one is due to the fact that in man both health and sickness are contagious. The contagion of disease is violent and rapid, while that of health is extremely weak and slow. If two bodies are brought into contact with each other, it is certain that microbic particles will pass from one to the other. In the same way that disease is transferred from one body to another with rapid and strong contagion, it may be that the strong health of a healthy man will alleviate a very slight malady in a sick person. That is to say, the contagion of disease is violent and has a rapid effect, while that of health is very slow and has a small effect, and it is only in very slight diseases that it has even this small effect. The strong power of a healthy body can overcome a slight weakness of a sick body, and health results. This is one kind of healing.

The other kind of healing without medicine is through the magnetic force which acts from one body on another and becomes the cause of cure. This force also has only a slight effect. Sometimes one can benefit a sick person by placing one's hand upon his head or upon his heart. Why? Because of the effect of the magnetism, and of the mental impression made upon the sick person, which causes the disease to vanish. But this effect is also very slight and weak.

Of the two other kinds of healing which are spiritual--that is to say, where the means of cure is a spiritual power--one results from the entire concentration of the mind of a strong person upon a sick person, when the latter expects with all his concentrated faith that a cure will be effected from the spiritual power of the strong person, to such an extent that there will be a cordial connection between the strong person and the invalid. The strong person makes every effort to cure the sick patient, and the sick patient is then sure of receiving a cure. From the effect of these mental impressions an excitement of the nerves is produced, and this impression and this excitement of the nerves will become the cause of the recovery of the sick person. So when a sick person has a strong desire and intense hope for something and hears suddenly the tidings of its realization, a nervous excitement is produced which will make the malady entirely disappear. In the same way, if a cause of terror suddenly occurs, perhaps an excitement may be produced in the nerves of a strong person which will immediately cause a malady. The cause of the sickness will be no material thing, for that person has not eaten anything, and nothing harmful has touched him; the excitement of the nerves is then the only cause of the illness. In the same way the sudden realization of a chief desire will give such joy that the nerves will be excited by it, and this excitement may produce health.

To conclude, the complete and perfect connection between the spiritual doctor and the sick person--that is, a connection of such a kind that the spiritual doctor entirely concentrates himself, and all the attention of the sick person is given to the spiritual doctor from whom he expects to realize health--causes an excitement of the nerves, and health is produced. But all this has effect only to a certain extent, and that not always. For if someone is afflicted with a very violent disease, or is wounded, these means will not remove the disease nor close and heal the wound--that is to say, these means have no power in severe maladies, unless the constitution helps, because a strong constitution often overcomes disease. This is the third kind of healing.

But the fourth kind of healing is produced through the power of the Holy Spirit. This does not depend on contact, nor on sight, nor upon presence; it is not dependent upon any condition. Whether the disease be light or severe, whether there be a contact of bodies or not, whether a personal connection be established between the sick person and the healer or not, this healing takes place through the power of the Holy Spirit."

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.

The majority of the diseases which overtake man also overtake the animal, but the animal is not cured by drugs. In the mountains, as in the wilderness, the animal's physician is the power of taste and smell. The sick animal smells the plants that grow in the wilderness; he eats those that are sweet and fragrant to his smell and taste, and is cured. The cause of his healing is this. When the sugar ingredient has become diminished in his constitution, he begins to long for sweet things; therefore, he eats an herb with a sweet taste, for nature urges and guides him; its smell and taste please him, and he eats it. The sugar ingredient in his nature will be increased, and health will be restored.

It is, therefore, evident that it is possible to cure by foods, aliments and fruits; but as today the science of medicine is imperfect, this fact is not yet fully grasped. When the science of medicine reaches perfection, treatment will be given by foods, aliments, fragrant fruits and vegetables, and by various waters, hot and cold in temperature."