Now the components of the human body are simply various chemical elements—so much carbon, so much hydrogen, etc., as any textbook on the subject will tell you; and although, of course, every sort of substance is the abode of ceaseless atomic energy, we all recognize that merely atomic energy is not that of the powers of thought, will, and perception, which make us organized mentalities instead of a mere aggregation of the various substances exposed to view in a biological museum, as constituting the human body—you might take all these substances in their proper proportions, and shake them up together, but you would not make an intelligent man of them. We are therefore safe in saying that the physiological body represents the principle of inertia in us, while the something that thinks in us represents the principle of Ertia.
The balance of power between the Life Principle in us and the Death Principle, is then, necessarily, a question of the balance between these two, the spirit and the flesh, or ertia and inertia.
Why then does the balance preponderate to the life-side for a certain length of time, and then go over to the opposite side?
Now this brings us to the distinction which the old writers drew, between the "Vital Soul" of any living thing and the Spirit. Their conception of the "Vital Soul" was very much the same as I have set forth in the chapter on "The Soul of the Subject." It is the individual's particular share of the Cosmic Soul or Anima Mundi, whether it be an individual tree, or an individual person; and the ordinary maximum length of time, during which the Vital Soul will be able to overcome the inertia of its physical vehicle, depends upon the particular class to which the individual belongs. What the ordinary maximum is in regard to any species is a matter of experience, and it is in this way that we have fixed the usual limit of human life at three-score years and ten.
Now it is here that we shall begin to profit by some knowledge about the invisible part of ourselves. The actual molecules of our body, as I have just said, are only so much dead matter. This inert material is pulled about in various directions by strings which we call muscles, according to the movements we wish our bodies to make, and these muscles are set in motion by the vibrations of the nerves.[4] But what is it that occasions these vibrations of the nerves? Here we begin to pass beyond the limits of official Science, though not beyond the limits of recognizable Law. We have to recognize the existence of an etheric body acting as an intermediary between intention, desire, or (in the case of human beings) thought of the soul and the physical vibrations of the nerves. This is why, in an earlier chapter, I have drawn attention to our power of sending out etheric vibrations beyond the limits of the physical body, as in the case of De Rocha's experiments. Such experiments show that there is in us something not composed of dense matter, which is able to convey vibrations to dense matter; and it is this something which we speak of as the etheric body.
But if we wish to trace the links by which our thought operates upon the physical body, we find ourselves compelled to postulate yet another intermediary, what I have spoken of as the "Vital Soul"—a vehicle which does not consciously think, but in which what we may call race-consciousness becomes centred in the individual. This race-consciousness is none other than the ever-present "will-to-live" which is the basis of physical evolution—that automatically acting principle—which causes plants to turn towards the sun, animals to seek their proper food, and both animals and men to try instantly to escape from immediate danger. It is what we call instinct which does not reason. I may give a laughable experience of my own to illustrate the fact that conscious reason is not the method of this faculty. Once when on leave from India I was walking along a street in London in the heat of a summer's day and suddenly noticed just at my feet a long dark thing apparently wriggling across the white glare of the pavement. "Snake!" I exclaimed, and jumped aside for all I was worth, and the next moment was laughing at myself for not recollecting that cobras were not common objects in the London streets. But it looked just like one, and of course turned out to be nothing but a piece of rag. Well, instinct did its duty even if it did make a fool of me; but there is certainly no conscious reasoning in the matter, only the automatic action of inherent Law—"Self-preservation is the first law of Nature."
This Vital Soul, then, is the seat of all those instincts which go towards the preservation of the individual's physical body, and towards the propagation of the race; and it is on this account that our theosophical friends call it the "Desire Body" or, to use the Indian term "Kama rupa." It acts with conscious intention, but not with conscious reasoning. It is thus distinguished on the one hand from the etheric body, which is a mere vehicle for finer vibrations than can take place in the denser matter of the physical body, but which has no intention; and on the other from the mind which acts by conscious reasoning, and it thus forms an intermediary between the two.
The importance of recognizing the place of this higher intermediary in the ascending scale of living principle is, that for all practical purposes the animal world does not rise higher than this in the scale. It is true that in particular instances we find the first dawning of the mental faculty in an animal, but it is only very faint; so this does not affect the broad general principle. The point to be noted is that up to this stage human beings are built on the same lines as animals, and what distinguishes us, is the addition in ourselves of a higher factor,—that of the reasoning mind exercising the power of conscious thought.
Now it is the direction of this thought that influences the three lower factors. The sequence, going upwards, is as follows:—movement is communicated to the physical body by the etheric body; and movement is communicated to the etheric body by the Vital Soul; then, in proportion as the purely instinctive action of the Vital Soul is controlled by the conscious thought, so its action upon the two lowest principles is modified.
Here, then, is the crucial point. In what direction is the conscious thought going to modify the action of the three principles that are below it? If it takes the soul of mere racial desire and the physical body as its standard of thought, then it naturally follows that it cannot raise it any higher. It has descended to their level and so cannot pour any stream of life into it, on the simple principle that no current can ever flow from a lower to a higher level, whether the difference in level be that of actual elevation, as in the case of water, or different in potential, as in the case of electricity. On the other hand if the conscious mind recognizes that itself proceeds from some higher source, it looks to receive life from that source, and its thought is modified accordingly, and in turn re-acts correspondingly upon the lower principles.