On the hypothesis of the Self-contemplation of Spirit being the originating power, we have found that a primary ether, or universal substance, is the necessary correspondence to Spirit's simple awareness of its own being. But though awareness of being is the necessary foundation for any further possibilities it is, so to say, not much to talk about. The foundation fact, of course, is to know that I Am; but immediately on this consciousness there follows the desire for Activity--I want to enjoy my I Am-ness by doing something with it. Translating these words into a state of consciousness in the Cosmic Mind they become a Law of Tendency leading to _localised_ activity, and, looking only at our own world, this would mean the condensation of the universal etheric substance into the primary nebula which later on becomes our solar system, this being the correspondence to the Self-contemplation of Spirit as passing into specific activity instead of remaining absorbed in simple awareness of Being. Then this self-recognition would lead to the conception of still more specific activity having its appropriate polar opposite, or material correspondence, in the condensation of the nebula into a solar system. Now at this stage Spirit's conception of itself is that of Activity, and consequently the material correspondence is Motion, as distinguished from the simple diffused ether which is the correspondence of mere awareness of Being, But what sort of motion? Is the material movement evolved at this stage bound to take any particular form? A little consideration will show us that it is. At this initial stage, the first awakening, so to say, of Spirit into activity, its consciousness can only be that of activity _absolute_; that is, not as related to any other mode of activity because as yet there is none, but only as related to an all-embracing Being; so that the only possible conception of Activity at this stage is that of _Self-sustained_ activity, not depending on any preceding mode of activity because there is none. The law of reciprocity therefore demands a similar self-sustained motion in the material correspondence, and mathematical considerations show that the only sort of motion which can sustain a self-supporting body moving _in vacuo_ is a rotary motion bringing the body itself into a spherical form. Now this is exactly what we find at both extremes of the material world. At the big end the spheres of the planets rotating on their axes and revolving round the sun; and at the little end the spheres of the atoms consisting of particles which, modern science tells us, in like manner rotate round a common center at distances which are astronomical as compared with their own mass. Thus the two ultimate units of physical manifestation, the atom and the planet, both follow the same law of self-sustained motion which we have found that, on _a priori_ grounds, they ought in order to express the primary activity of Spirit. And