Coming downwards, beginning on the mental plane with Intelligence--missing the two higher ones of Existence and Love--He sends out vibrations to make the matter of the mental plane answer, and the vibrations with which that matter answers, that is, a certain range of vibrations, are called mental or intelligent. You may say, Why? Just for the same reason that in Sir William Crookes' tables definite names are given to the different classes of vibrations, which produce sound, light, etc., names are given in order to express a certain limit of vibratory force; within one set of limits the vibrations affect the ether, give "light," and the eye receives them. Similarly, vibrations that fall between certain limits of vibratory frequency affect the matter of the third plane, and when they are received by an organ fitted to focus them in a centre, thus giving rise to self-consciousness, we call that organ Mind, and the action through that Mind, Intelligence. The mere name is as arbitrary as any other name, and we class these under mental, just as a certain range of etheric vibrations is classed as light, is received by an organ fitted to focus them that we call the eye, and the action through that eye is vision. If we are to talk at all, we must have names to describe different classes of phenomena, and we use the word mental or intelligent to describe the range of vibrations working in the particular kind of matter of which, in the upward evolution, an organ is builded that we call the Mind. So, again, to the vibrations that He sends out into the next coarser form of matter, called Apas, or astral, we give the name Sensory. He imparts to them the quality of responding to pleasure and pain, and as He makes this downward sweep He brings into renewed existence on each plane Devas, or beings which have as their characteristic manifestation the quality of their own plane; thus the Devas of the mental plane have the quality of intelligence as their chief peculiarity, and the Devas of the next lower plane have as their chief quality feeling, or the power of sensation, and those of the lowest plane have as their chief quality action, activity. Each Deva class shows out specially the quality of its plane, and inasmuch as these Devas draw into their own bodies the matter of the plane in which they live, they help on its evolution; for they draw it in, use it and thus develop it, and throw it out again into the general reservoir, just as man draws in physical matter, uses it in his body, and again throws it out into the physical world. As that process goes on and on and on through the ages, the whole of that kind of matter we call mental passes through the bodies of these Devas, takes on to itself the habit of responding readily to the vibrations of intelligence, and thus becomes ready for building into the mental body of man. The matter of the astral plane is builded into the bodies of the Devas of that plane until it takes up this habit of more and