Lecture VI

Thus you see that from a different standpoint I have come back again to what I have already touched upon in these lectures. No matter how much animal food a human being may eat, it is all useless for a certain part of his brain, it is merely ballast. Other organs may be nourished thereby, but in the brain there is something from which the etheric body at once thrusts back all that comes from the animal kingdom. Indeed, the etheric body even thrusts back from one part of the brain, from one small, vital part of the brain, all that comes from the plant kingdom, and allows only the mineral extract to be of value; there this mineral extract is brought into contact with the purest of what comes through the sense organs. The purest of light, the purest sound, the purest heat, here come in touch with the purest products of the mineral kingdom; for the most vital part of the human brain is nourished by the union of the purest sense impressions with the purest mineral products. The etheric body separates from this noblest part of the human brain all that comes from the plant or animal kingdoms. But all the things that the human being takes in as his food pass up also; for the brain also has less noble parts. These are nourished by all that streams up, by which the whole organism is nourished. Only the noblest part of the brain must be nourished by the most beautiful union of the sense perceptions and the highest part of the purified mineral extract. We now learn to recognise a wonderful cosmic connection between man and the whole of the rest of the cosmos. We can now see, as it were, a part of man wherein we perceive how human thought, by means of the instrument of the nervous system which serves the astral body, prepares the sword for human strength on earth; therein we become acquainted with all that is mingled with the blood, and to a certain extent contributes to the killing of the most precious thing in the brain. And this noblest thing in the brain is ever sustained by the union of the most delicate sense perceptions with the purest products of the mineral kingdom. And then, during sleep, when thought is not making use of the brain, there stream to the brain the products which have been formed lower down in the inner parts from the plant and animal kingdoms.