Psychological causes of disease register in the brain or (if of a very low order) in the solar plexus. They do not, however, make their presence felt as symptoms of disease in these places where they thus register. They are energies or forces which - when brought into contact with the energies of the body - produce, as a result (and not before this point) those conditions to which we give the name of disease. The psychological causes are forms of energy, working out through the appropriate centers in the body, and these, in their turn, condition the glandular system. [338] The secretion or hormone, generated under this esoteric stimulation, finds its way into the blood stream, and the result of all this interaction can be either good health, as it expresses sound psychological causes, or poor health, as it expresses the reverse.

It is the internal relation between the subtler energies, working through certain centers, plus the related endocrine system, with its relation to the blood stream, that constitutes both the possibility of disease and its cure. But this recognition is still academically lacking. Much of the inherent psychology is grasped, but a gap still exists between the physical and the etheric bodies, and little recognition of the etheric body is yet academically accorded. There is yet no real understanding of the relation between the inner psyche and the outer form, via the etheric body. The study of the glands has somewhat helped, but medical science must go a step further and relate the glandular system to the inner centers.