I. Spiritual Science and the Future of Humanity

One can understand Aristotle only if one knows that that which he lets originate from the heart is thought as supersensible currents that he does not mean physical strands, organs, or the like. Now the Middle Ages came. The people lost the understanding of the old clairvoyance. They read Aristotle, and through the Middle Ages the faith in Aristotle was like a faith in the Bible. Aristotle was the basis of natural science, of medicine, of everything. Everything was based on Aristotle. However, people had no idea of that which, actually, Aristotle had meant. Thus, a peculiar mental picture could develop just with the most religious supporters of Aristotle, with those who believed bravely in him, but did no longer understand him. Since—as everybody knows—it is not necessary that everything is understood that one believes. Mental pictures could develop so that one did not mean supersensible currents that originate in the heart but sensory strands. Thus, Aristotle's believers believed that from the heart the nerves originate.