In my book, "Riddles of the Soul," I have already attempted to give a brief description of this threefold character of the natural human organism in a way that tallies completely with what scientific research has as yet to tell us on the subject. It seems to me clear, that biology, physiology, and natural science in general as it deals with man, are all rapidly tending to a point of view which will shew, that what keeps the whole complex process of the human organism in working order is just this comparatively separate functioning of its three separate systems, the head system, the circulation, or chest system and the metabolic system,--that there is no such thing as absolute centralisation in the human organism, and, moreover, that each of these systems has its own special and distinct relation to the outer world, the head system through the senses, the rhythmic or circulatory system through the breathing, the metabolic system through the organs of nourishment and organs of movement. What I have here indicated goes much deeper down to spiritual sources that I have tried to utilise for natural science. In natural-science circles themselves, it is a fact not yet so generally recognised as might perhaps be desirable for the advancement of knowledge; but that merely means that our habits of thought, our whole way of picturing the world to ourselves, is not yet completely adapted to the inner life and being of nature's workings, as manifested, for instance, in the human organism. People of course may say, "No matter. Natural science can afford to wait. She will come to her ideals bit by bit, and views such as yours will gain recognition all in good time." But the body social cannot afford to wait, neither for the right views nor for the right practice. Here an understanding is necessary,--if only an instinctive one,--of what the body social needs,--and not merely an understanding amongst a handful of experts, but in every single human soul;--for every human soul takes its own share in the general working of the body social. Sane thinking and feeling, sane will and desires as to the form to be given the body social,--these are only to be developed, when one comes to recognise,--even though only instinctively,--that, in order to thrive, the social organism, like the natural one, requires to be threefold.