From times immemorial the sages have taught that we shall never know immortal truth, if we do not discover it within our own selves. Experience has long ago corroborated this theory, for in spite of all progress in scientific researches concerning the nature of Man, and which were carried on by means of researches in the external kingdom of nature, the real constitution of Man and that which constitutes his essential being has not yet been discovered. We know that from the ovum the fœtus, from the fœtus the child, from the child the body of man becomes developed; we know the order in which these processes take place; but we seem to know nothing about the powers that produce them. Such an alchemical trick of nature as to make a man grow out of a cell in which no man is contained would seem absurd, incredible and miraculous, and would be believed by nobody, if it were not a well-known fact, and being of daily occurrence it has ceased to appear surprising, so that it appears now strange if anyone wonders how such a thing is possible.
Horne says: “By a silent, unseen, mysterious process, the fairest flower of the garden springs from a small insignificant seed.” A similar mysterious process takes place in the evolution of the human body. All these processes are evidently the effects of the action of a cause adequate to produce them; to deny this would be identical with affirming the self-evident absurdity, that something could grow out of nothing, and the law of logic furthermore makes it clear that although a physical cause can produce a physical effect, a living body can only be produced by a living power, an intellectual organism by an intelligent being. Whether or not the animal body of man has evoluted from the lower animal kingdom, or whether certain animals are the products of a perversion and degradation of the nature of man, does not concern us at present. What we know is, that no life and intelligence can become manifest in a form unless these powers are contained therein, and we also know that life cannot be created by death nor can intelligence be created by that which has no intelligence.
But if popular science confessedly knows nothing about the origin of the manifestation of life, nothing about what is vaguely termed “soul,” nothing about the nature and origin of the mind (whose functions are required for the purpose of enabling the brain to investigate such things) nothing about the spirit and nothing about the higher constitution of man, whose external expression and symbol is his physical body; it will not be inappropriate to apply to other sources for information and hear what the ancient sages taught concerning the principles that go to make up the constitution of man. The first requisite of a rational and perfect system of a medicine is a thorough knowledge of the whole constitution of man; of the whole, and not merely of a part of his nature.
The ancient Indian sages compared man to a lotus flower, whose home is the water (the world), whose roots draw their nutriment from the earth (material nature), while it raises its head to the light (the spiritual kingdom), from which it receives the power to unfold the powers latent in its constitution.
A great deal has already been said in Theosophical literature about the sevenfold constitution of man: but for the sake of completeness we will delineate it again.
1. Rupa. The physical body, the vehicle of all the other “principles” during life.
2. Prana. Life or vital principle.
3. Linga Sharira. The astral body. The ethereal image or counterpart of the physical body, the “phantom body.”
4. Kama rupa. The animal soul. The seat of animal desires and passions. In this principle is centred the life of the animal and mortal man.
5. Manas. Mind. Intelligence. The connecting link between the mortal and immortal man.