# Man, Nature and the Cosmos

## GA 91 — 26 August 1905, Berlin

### 19. Light, Heat, Sound

It is always necessary to a kingdom of nature that three certain forces be processed by the beings of this kingdom of nature. Thus, the mineral kingdom processes the chemical forces. The plant kingdom depends on the light; certainly also heat is necessary, but it remains in the environment, the light processes the plant directly. The animal kingdom processes the heat, the fire. Then in the human kingdom the sound is processed. All processing is done through organs. Through leaves, the light is processed into the plant, and this creates the pigment chlorophyll, green color. Animal life warmth is produced by the heart. The heart is the organ through which the heat passes into the human and animal body, it works the heat around. The heart, like the other human organs, is built symmetrically. Actually, man has two hearts separated by a septum. Each half of the heart is in turn separated by a septum into atrium and actual heart, so that one has to distinguish four spaces: Atrium and ventricle, connected by the valve, and right and left heart. Now from the left ventricle goes the great vein, aorta, upward first; then the aorta sends a branch that supplies the brain. Another branch goes throughout the body, supplying the abdominal region through a fine vein. Other branches go down into the limbs, and then they come into the right atrium. From the brain, a branch goes back into the right atrium. This is the great circulation.

From the right ventricle goes the small circulation; the branch goes directly into the lungs and coming back from the lungs goes into the left atrium, then through the left valve into the left ventricle. In the lungs, the blood is renewed; it breathes in the oxygen, the blue blood goes through the combustion process and starts its cycle again as red blood. Combustion always means the combination of a substance with the oxygen of the air. What goes on in the lungs is a process of combustion; a real relationship that develops between the individual animal body and the whole air is what happens. Just as the plant consumes light, so the animal consumes fire; it is a heating of the body. The higher process is that which then takes place in man alone - animals have merely a disposition of it - that is sound.

These three links represent a connection between microcosm and macrocosm. The big circuit that goes through the whole body is called microcosm; the single being and the small circuit represent the connection with the macrocosm. There are transitions between individual beings: Fishes have no lungs and also no heart so developed, therefore the fish has alternating warmth, the warmth of its environment. The heart gradually works its way out in the reptile; the lungs work their way out of the swim bladder, from an aquatic organ into an air organ.

Everything in the world is based on this connection between microcosm and macrocosm. The connections made in this way make it clear that it is impossible for human beings to be separated from the larger world. It is impossible for man to exist without air. It is illusion to believe that man is more independent than his hand. He, too, can live only in connection with the great organism. It belongs to the earth as the hand belongs to man. The heart is a kind of brain for the future. This can also be understood already now. The brain is merely a bulge of the nervous system. Now there is not only this nervous system in the human body, but also the solar plexus, the sympathetic nervous system. There are two smaller strands on the spinal cord, they spread out, and their task is to supply all involuntary movements of the human being, which are connected with digestion, respiration and so on, plexus solaris. In lower animals this sympathetic nervous system has a much greater importance, because it precedes the actual formation of the heart, as for example in the intestinal animals, they are also called plant animals. Now the heart is formed with its nervous system and makes the creature self-sufficient, which develops its brain.

Three things we can say:

First: The world creates a being through the sympathetic nervous system.

Second, it gives it the opportunity to become self-sufficient through the heart.

And thirdly, the cerebral nervous system is formed, whereby that which formerly acted upon the heart from without, acts outwardly from the brain through the heart. As to the sympathetic nervous system corresponds light, so to the brain corresponds inner light, and between the two stands heat.