I. Soul and Spirit in the Human Physical Constitution

The other elements, the fluid element, as I have shown by the example of the cerebral fluid, and the airy element, are not regarded by anatomy and physiology as belonging to the human organism as such. It is said: Yes, the human being draws in the air which follows certain paths in his body and also has certain definite functions. The air is breathed out again.—Then people speak of the warmth-condition of the body, but in reality they regard the solid element as the only organizing factor and do not realize that in addition to this solid structure they should also see the whole organism as a column of fluid (blue), as being permeated with air (red) and as having a definite degree of warmth (yellow).(Illustration II) More exact study shows that just as the solid or solid-fluid constituents are an integral component of the organism, so the fluid should not be thought of as so much uniform fluid, but differentiated and organized—though the process here is a more fluctuating one—and having its own particular significance.