The fact is that in this particular case our despised forefathers' analysis went several steps deeper than our own. They understood and were able to observe the ether, which modern science can only postulate as a necessity for its theories; they were aware that it consists of physical matter in four entirely distinct states above the gaseous—a fact which has not yet been re-discovered. They knew that all physical objects consisted of matter in one or other of these seven states, and that into the composition of every organic body all seven entered in a greater or lesser degree; hence all their talk of fiery and watery humours, or "elements," which seems so grotesque to us. It is obvious that they used the latter word simply as a synonym for "constituent parts," without in the least degree intending it to connote the idea of substances which could not be further reduced. They knew also that each of these orders of matter served as an Upâdhi or basis of manifestation for a great class of evolving monadic essence, and so they christened the essence "elemental".

What we have to try to realize, then, is that in every particle of solid matter, so long as it remains in that condition, there resides, to use the picturesque phraseology of mediæval students, an earth elemental—that is, a certain amount of the living elemental essence appropriate to it, while equally in every particle of matter in the liquid, gaseous, or etheric states, the water, air, and fire "elementals" respectively inhere. It will be observed that this first broad division of the third of the elemental kingdoms is, so to speak, a horizontal one—that is to say, its respective classes stand in the relation of steps, each somewhat less material than the one below it, which ascends into it by almost imperceptible degrees; and it is easy to understand how each of these classes may again be divided horizontally into seven, since there are obviously many degrees of density among solids, liquids and gases. There is, however, what may be described as a perpendicular division also, and this is somewhat more difficult to comprehend, especially as great reserve is always maintained by occultists as to some of the facts which would be involved in a fuller explanation of it. Perhaps the clearest way to put what it is permissible to say on the subject will be to state that in each of the horizontal classes and subclasses will be found seven perfectly distinct types of elemental, the difference between them being no longer a question of degree of materiality, but rather of character and affinities. Each of these types so reacts upon the others that, though it is impossible for them ever to interchange their essence, in each of them seven sub-types will be found to exist, distinguished by the colouring given to their original peculiarity by the influence which sways them most readily. It will at once be seen that this perpendicular division and subdivision differs entirely in its character from the horizontal, in that it is far more permanent and fundamental; for while it is the evolution of the elemental kingdom to pass with almost infinite slowness through its various horizontal classes and subclasses in succession, and thus to belong to them all in turn, this is not so with regard to the types and sub-types, which remain unchangeable all the way through. A point which must never be lost sight of in endeavouring to understand this elemental evolution is that it is taking place on what is sometimes called the downward curve of the arc; that is to say, it is progressing towards the complete entanglement in matter which we witness in the mineral kingdom, instead of away from it, as is most other evolution of which we know anything; and this fact sometimes gives it a curiously inverted appearance in our eyes until we thoroughly grasp its object.

In spite of these manifold subdivisions, there are certain properties which are possessed in common by all varieties of this strange living essence; but even these are so entirely different from any with which we are familiar on the physical plane that it is exceedingly difficult to explain them to those who cannot themselves see it in action. Let it be premised, then, that when any portion of this essence remains for a few moments entirely unaffected by any outside influence (a condition, by the way, which is hardly ever realized) it is absolutely without any definite form of its own, though even then its motion is rapid and ceaseless; but on the slightest disturbance, set up perhaps by some passing thought-current, it flashes into a bewildering confusion of restless, ever-changing shapes, which form, rush about, and disappear with the rapidity of the bubbles on the surface of boiling water. These evanescent shapes, though generally those of living creatures of some sort, human or otherwise, no more express the existence of separate entities in the essence than do the equally changeful and multiform waves raised in a few moments on a previously smooth lake by a sudden squall. They seem to be mere reflections from the vast storehouse of the astral light, yet they have usually a certain appropriateness to the character of the thought-stream which calls them into existence, though nearly always with some grotesque distortion, some terrifying or unpleasant aspect about them. A question naturally arises in the mind here as to what intelligence it is that is exerted in the selection of an appropriate shape or its distortion when selected. We are not dealing with the more powerful and longer-lived artificial elemental created by a strong definite thought, but simply with the result produced by the stream of half-conscious, involuntary thoughts which the majority of mankind allow to flow idly through their brains, so that the intelligence is obviously not derived from the mind of the thinker; and we certainly cannot credit the elemental essence itself, which belongs to a kingdom further from individualization even than the mineral, with any sort of awakening of the mânasic quality. Yet it does possess a marvellous adaptability which often seems to come very near it, and it is no doubt this property that caused elementals to be described in one of our early books as "the semi-intelligent creatures of the astral light". We shall find further evidence of this power when we come to consider the case of the artificial class. When we read of a good or evil elemental, it must always be either an artificial entity or one of the many varieties of nature spirits that is meant, for the elemental kingdoms proper do not admit of any such conceptions as good and evil, though there is undoubtedly a sort of bias or tendency permeating nearly all their subdivisions which operates to render them rather hostile than friendly towards man, as every neophyte knows, for in most cases his very first impression of the astral plane is of the presence all around him of vast hosts of Protean spectres who advance upon him in threatening guise, but always retire or dissipate harmlessly if boldly faced. It is to this curious tendency that the distorted or unpleasant aspect above mentioned must be referred, and mediæval writers tell us that man has only himself to thank for its existence. In the golden age before this Kaliyuga men were on the whole less selfish and more spiritual, and then the "elementals" were friendly, though now they are no longer so because of man's indifference to, and want of sympathy with, other living beings. From the wonderful delicacy with which the essence responds to the faintest action of our minds or desires it seems clear that this elemental kingdom as a whole is very much what the collective thought of humanity makes it. Any one who will think for a moment how far from elevating the action of that collective thought is likely to be at the present time will see little reason to wonder that we reap as we have sown, and that this essence, which has no power of perception, but only blindly receives and reflects what is projected upon it, should usually exhibit unfriendly characteristics. There can be no doubt that in later races or rounds, when mankind as a whole has evolved to a much higher level, the elemental kingdoms will be influenced by the changed thought which continually impinges upon them, and we shall find them no longer hostile, but docile and helpful, as we are told that the animal kingdom will also be. Whatever may have happened in the past, it is evident that we may look forward to a very passable "golden age" in the future, if we can arrive at a time when the majority of men will be noble and unselfish, and the forces of nature will co-operate willingly with them.

The fact that we are so readily able to influence the elemental kingdoms at once shows us that we have a responsibility towards them for the manner in which we use that influence; indeed, when we consider the conditions under which they exist, it is obvious that the effect produced upon them by the thoughts and desires of all intelligent creatures inhabiting the same world with them must have been calculated upon in the scheme of our system as a factor in their evolution. In spite of the consistent teaching of all the great religions, the mass of mankind is still utterly regardless of its responsibility on the thought-plane; if a man can flatter himself that his words and deeds have been harmless to others, he believes that he has done all that can be required of him, quite oblivious of the fact that he may for years have been exercising a narrowing and debasing influence on the minds of those about him, and filling surrounding space with the unlovely creations of a sordid mind. A still more serious aspect of this question will come before us when we discuss the artificial elemental; but in regard to the essence it will be sufficient to state that we undoubtedly have the power to accelerate or delay its evolution according to the use which consciously or unconsciously we are continually making of it.

It would be hopeless within the limits of such a treatise as this to attempt to explain the different uses to which the forces inherent in the manifold varieties of this elemental essence can be put by one who has been trained in their management. The vast majority of magical ceremonies depend almost entirely upon its manipulation, either directly by the will of the magician, or by some more definite astral entity evoked by him for that purpose. By its means nearly all the physical phenomena of the séance-room are produced, and it is also the agent in most cases of stone-throwing or bell-ringing in haunted houses, such results as these latter being brought about either by blundering efforts to attract attention made by some earth-bound human entity, or by the mere mischievous pranks of some of the minor nature-spirits belonging to our third class. But the "elemental" must never be thought of as itself a prime mover; it is simply a latent force, which needs an external power to set it in motion. It may be noted that although all classes of the essence have the power of reflecting images from the astral light as described above, there are varieties which receive certain impressions much more readily than others—which have, as it were, favourite forms of their own into which upon disturbance they would naturally flow unless absolutely forced into some other, and such shapes tend to be a trifle less evanescent than usual.

Before leaving this branch of the subject it may be well to warn the student against the confusion of thought into which some have fallen through failing to distinguish this elemental essence which we have been considering from the monadic essence manifesting through the mineral kingdom. It must be borne in mind that monadic essence at one stage of its evolution towards humanity manifests through the elemental kingdom, while at a later stage it manifests through the mineral kingdom: but the fact that two bodies of monadic essence at these different stages are in manifestation at the same moment, and that one of these manifestations (the earth elemental) occupies the same space as and inhabits the other (say a rock), in no way interferes with the evolution either of one or the other, nor does it imply any relation between the bodies of monadic essence lying within both. The rock will also be permeated by its appropriate variety of the omnipresent Jîva or life principle, but that of course is again totally distinct from either of the essences above mentioned.

2. The Kâmarûpas of Animals.

This is an extremely large class, yet it does not occupy a particularly important position on the astral plane, since its members usually stay there but a very short time. The vast majority of animals have not as yet acquired permanent individualization, and when one of them dies the monadic essence which has been manifesting through it flows back again into the particular stratum whence it came, bearing with it such advancement or experience as has been attained during that life. It is not, however, able to do this quite immediately; the kâmic aura of the animal forms itself into a Kâmarûpa, just as in man's case, and the animal has a real existence on the astral plane, the length of which, though never great, varies according to the intelligence which it has developed. In most cases it does not seem to be more than dreamily conscious, but appears perfectly happy. The comparatively few domestic animals who have already attained individuality, and will therefore be reborn no more as animals in this world, have a much longer and much more vivid life in Kâmaloka than their less advanced fellows, and at the end of it sink gradually into a subjective condition, which is likely to last for a very considerable period. One interesting subdivision of this class consists of the Kâmarûpas of those anthropoid apes mentioned in The Secret Doctrine (vol. i, p. 184) who are already individualized, and will be ready to take human incarnation in the next round, or perhaps some of them even sooner.

3. Nature-Spirits of all Kinds.

So many and so varied are the subdivisions of this class that to do them anything like justice one would need to devote a separate treatise to this subject alone. Some characteristics, however, they all have in common, and it will be sufficient here to try to give some idea of those. To begin with, we have to realize that we are here dealing with entities which differ radically from all that we have hitherto considered. Though we may rightly classify the elemental essence and the animal Kâmarûpa as non-human, the monadic essence which manifests itself through them will, nevertheless, in the fulness of time, evolve to the level of manifesting itself through some future humanity comparable to our own, and if we were able to look back through countless ages on our own evolution in previous manvantaras, we should find that that which is now ourselves has passed on its upward path through similar stages. That, however, is not the case with the vast kingdom of nature-spirits; they neither have been, nor ever will be, members of a humanity such as ours; their line of evolution is entirely different, and their only connection with us consists in our temporary occupancy of the same planet. Of course since we are neighbours for the time being we owe neighbourly kindness to one another when we happen to meet, but our lines of development differ so widely that each can do but little for the other.