Lecture X

What is the real nature of the element of human soul and spirit which lives outside during sleep? In the light of spiritual science, the determining factor is characteristically seen to come from the human being of limbs and metabolism. Studying what can be observed through higher vision one has the feeling—which gradually grows into the definite realization—that by taking this whole aspect here to be a photographic negative and visualizing the positive, we actually get the structure of the human brain. The scale is not the same, but if you see it as a negative and visualize the positive you get the human brain.