The intuitional faculty has its correspondence in this upper area of the brain situated between the frontal and posterior portions, and physiologically speaking, it is here that intuitive ideas find entrance. These at first are more or less unformed and generalized in character, but are nevertheless perceived by the conscious mind, otherwise we should not be aware of them at all. Then the effort of nature is to bring these ideas into more definite and usable shape, so the conscious mind lays hold of them and induces a corresponding vibratory current in the voluntary system of nerves, and this in turn induces a similar current in the involuntary system, thus handing the idea over to the subjective mind. The vibratory current which had first descended from the apex of the brain to the frontal brain and thus through the voluntary system to the solar plexus is now reversed and ascends from the solar plexus through the sympathetic system to the posterior brain, this return current indicating the action of the subjective mind. If we were to remove the surface portion of the apex of the brain we should find immediately below it the shining belt of brain substance called the "corpus callosum." This is the point of union between the subjective and objective, and as the current returns from the solar plexus to this point it is restored to the objective portion of the brain in a fresh form which it has acquired by the silent alchemy of the subjective mind. Thus the conception which was at first only vaguely recognized is restored to the objective mind in a definite and workable form, and then the objective mind, acting through the frontal brain--the area of comparison and analysis--proceeds to work upon a clearly perceived idea and to bring out the potentialities that are latent in it. It must of course be borne in mind that I am here speaking of the mental ego in that, mode of its existence with which we are most familiar, that is as clothed in flesh, though there may be much to say as to other modes of its activity. But for our daily life we have to consider ourselves as we are in that aspect of life, and from this point of view the physiological correspondence of the body to the action of the mind is an important item; and therefore, although we must always remember that the origin of ideas is purely mental, we must not forget that on the physical plane every mental action implies a corresponding molecular action in the brain and in the two-fold nervous system.