2. Human Duality

Now when we come to man—and I said yesterday that in occultism our task is not as simple as it is for the external scientific method in which everything can, so to speak, be jumbled together—we must always, when we study the human organs, be aware of the fact that these organs, or systems of organs, are capable of being put to certain uses for which the corresponding systems of organs in the animal organism, even when these appear similar, cannot be used. At this point we shall merely affirm in advance what will appear later as having a still more profound basis, that, in the case of man, we must designate the blood as an external instrument for the ego, for all that we denote as our innermost soul-centre, the ego; so that in the nerve-system we have an external instrument of the astral body, and in our blood an external instrument of the ego. Just as the nerve-system in our organism enters into certain relations with the blood, so do those inner regions of the soul which we experience in ourselves as concepts, feelings or sensations, etc., enter into a certain relation with our ego.