1. The Human Soul in Relation to World Evolution

The essential nature of man's senses can perhaps best be recognized if we consider the eye. The eye is a comparatively independent organ, set into its bone cavity. Only at the back of the eye do blood veins and nerves continue into the rest of the organism. Apart from this connection the eye is relatively independent. A whole series of physical processes take place in the eye, at least processes that can be interpreted as being physical. Speaking symbolically, we could say that light approaches and penetrates the eye and becomes modified to some extent. At present I shall not describe the physical and chemical processes as I wish to speak about soul life, not about physiology. But I want to draw your attention to the fact that the eye has a sort of independent life.