Lecture I
Suppose we take for example a human organ that is disturbed by reason of too strong a destructive process, and then look with sight made clear by spiritual-scientific knowledge at something outside in Nature, say at a plant; we shall know that in a particular plant there are anabolic—building-up—properties. Now it becomes apparent that in the habit of certain plants there are always anabolic properties and that these correspond precisely to the anabolic forces of human organs. Thus, we can discover—when we make use of these conceptions which have now been developed by me—that there are anabolic forces in the kidneys. Let us suppose the kidneys are too weak, that their destructive forces are excessive. We turn to the plants, and we find in the common horsetail, Equisetum arvense, anabolic forces which exactly correspond to those which belong to the kidneys. If we make a preparation from equisetum and administer it through the digestive process into the blood-circulation and thus conduct it in the right way to the region in the body where it can work, we strengthen the debilitated anabolic forces of the kidneys. And so we can proceed with all the organs. Once we have grasped this knowledge we have the possibility of bringing back into a condition of balance the unbalanced processes of integration and disintegration by using the forces which can be found in the outside world. If on the other hand we have to deal with forces of anabolism either in the kidneys or elsewhere which have become over-strong, then it will be necessary to reinforce the destructive processes. In this case we must have recourse to the lower type of plants, let us say the fern species, which have this property.