V. Illness and Death

Only the organs built according to physical laws are sustained by the physical principle; the processes of digestion, propagation and growth are sustained by the etheric principle. The astral body is the creator of the whole nervous system, right up to the brain, and also of the spinal cord and nerve fibers. Finally, the "I" is the architect of the blood circulation. In contemplating the human organism from the spiritual-scientific viewpoint, you will realize that the four members are in reality four entities that are completely different from one another. These entities have merged, and work together within human beings right down into the externally visible aspect of a person's organism. The four members of a person's being have different values. We shall understand their significance when we investigate how human development is dependent upon each of them.