Lecture II
I have already pointed out that this is just as if someone were to say: I go along a street where there are footprints and the tracks of wheels. Whence come these—tracks? It is the earth beneath which must have made them; the earth itself has made the traces of feet and wheels appear. Logically this is on a par with thinking that it is the brain that makes these impressions. When someone goes out, sees all kinds of tracks along the street and says: Aha—then it is the earth that is inwardly permeated by a variety of forces which make these tracks—the same as when the physiologist, examining the human brain, and substantiating the fact that all manner of processes are going on there, says: It is the brain that is doing all this. There is just as little reason for saying that it is the earth itself that makes the tracks which are really made by the men and vehicles moving around upon it as there is for saying that what the anatomists and physiologists discover is by the brain, when it is far rather the work of forces in movement in the etheric body.