Spiritual Insight into Human Constitution and Therapeutic Remedies

In order to understand such conditions, we must be able to look into the nature of the human being. We must remind ourselves of what was said in the last lecture when the results of anthroposophical research were explained. I said that it is possible to divide the whole organisation of man into three systems: (1) the nerves-and-senses; (2) the rhythmic system (which includes all rhythmical processes); (3) metabolic-limb system. I also said that the metabolic-limb system is the polar antithesis of the system of nerves-and-senses, while the rhythmic system is the mediator between the two: Each of these three systems is permeated by the four members of man's being—physical body, ether body, astral body and Ego-organisation. Now the constitution of man is very complicated. It cannot be said that in sleep the astral body and Ego-organisation pass entirely out of the physical and etheric bodies. It can so happen that the organism of nerves-and-senses is only partially forsaken by the higher principles. Then, because the system of nerves-and-senses has its main seat in the head, the head is constrained to develop something which gives an inclination towards sleep. Yet the man is not really asleep, for his metabolic-limb system and his rhythmic system still contain the astral body and Ego-organisation. These have only left the head. Hence there arises a state of dullness, or faintness, while the rest of the organism functions as in waking life. What I have here described does not necessarily arise from within; it can occur when something is applied from without—for instance if a certain quantity of lead is administered or lead combined with some other substance. Comatose states or vertigo, which are caused by the separation of the astral body and Ego-organisation from the head, can be brought about by the administration of certain quantities of lead. We see, therefore, that this substance, this lead, when it is taken inwardly, drives the astral body and Ego out of the head. Here we look deeply into the human organisation in its relation to the surrounding world; we see in this way that it can become dependent upon what is taken in by way of substance.