If we regard the order, which “is Heaven’s first law,” as the creation of the self-adjustment of accidentally arising circumstances, leaving out of consideration the fundamental Unity of the All and its one purpose, we would then probably find various laws of order in the universe, being essentially different from each other; and it would be difficult to know which of these laws it would be best to follow; but if we recognise in the order that rules all things a manifestation of one eternal law of order and harmony, the function of Supreme Wisdom acting in nature but not being the product of nature, it will remain for us only to know that supreme Law and obey it. The universe is only one, and is ruled by only one source of all laws; but there are many unities within the constitution of this great Unity; they constitute as many selves within Self, whose separate interests are not identical with that of the whole, and therefore the order obeyed by these temporary selves is not the same as that of the eternal whole. Thus the battle for existence, far from being the cause of the order observable in the world, is in fact the cause of the disorder existing therein. If man, like his divine prototype, were a perfect unity, a manifestation of will and thought identified and one, there would be only one law to obey: the law of his divine nature; he would be forever in harmony with himself; there would be no disharmonious elements in his nature, seeking to create an order of their own, and thereby causing discords and disease; but man is a compound being, there are many elements in his nature, each representing to a certain extent an independent form of will, and the more one of these modifications of will succeeds in departing from the order that constitutes the whole, and to enact, be it intelligently or instinctively, a will of its own, the greater will be the disharmony which it causes within the whole organism and the greater will be the disease.[1] “A house divided against itself will fall.” _Disease is the disharmony which follows the disobedience to the law; the restoration consists in restoring the harmony by a return to obedience to the law of order which governs the whole._ The key to the cure of diseases is therefore in the understanding of the fundamental law which governs the nature of man, and for this purpose it is necessary that a rational system of medicine should know the constitution of man; not only that of his physical body, which is merely the lower part of the house wherein he dwells; but the whole physical, astral and mental constitution of that being called “Man,” which is still the greatest mystery to science, and of which little more than the anatomy, the physiological functions and the chemical composition of the material organs and substances composing his corporeal form is either known to or taught by our modern academies.