To an occult investigator the fact appears differently. To him heat is something of which he speaks in the same sense as he speaks of gases, of liquids, or of solid bodies. To him it is simply a still finer substance than gas. And gas to him is nothing but condensed heat, in the same sense that liquid is condensed vapour, or a solid body condensed liquid. Thus the occultist speaks of heat bodies just as he does of bodies formed of gas and vapour. If we are to follow the spiritual investigator into this region, it is however necessary to admit that there is such a thing as psychic perception. In the world, as it presents itself to the physical senses, heat appears entirely as a condition of solid, liquid, or gaseous bodies; but that condition is merely the outward appearance of heat, or the effect of it. Physicists speak only of this effect of heat, not of its inner nature. Just let us try then to leave entirely out of consideration any effect of heat received through external bodies, and to realize merely the inner experience which comes from saying the words: “I feel warm,” “I feel cold.” That inner experience is the only thing capable of giving an idea of what Saturn was during its period of evolution described above. It would have been possible to pass right through the portion of space it occupied; no gas would have been there to exercise pressure, no solid or liquid body from which light-impressions could have come; but at every point of space occupied, one would have felt inwardly, without any external impression: “Here there is such and such a degree of heat.” In a cosmic body of this character there are no conditions for the animal, vegetable, and mineral organisms of to-day.(9) The beings whose sphere of action was this Saturn, were at quite a different stage of evolution from that of the present inhabitants of the earth who are perceptible to the senses. In the first place there were beings there who had no physical body like that of contemporary man. We must also guard against thinking of man’s present physical embodiment, when mention is made of a “physical body” in this connection. We should instead carefully distinguish between the physical and the mineral body. A physical body is one governed by the physical laws which are now observable in the mineral kingdom. Now man’s present physical body is not only ruled by those physical laws, but is also permeated with mineral matter. There can be no question as yet on Saturn of a physical-mineral body of this kind. There is only a physical bodily form, governed by physical laws; but these laws are manifested only through the agency of heat.