Perception of the Nature of Thought
All that is above the dividing line is really the hidden part of human nature. If we wish to study the laws underlying the foundation of the physical body we must look to super-sensible laws determining man's destiny. If we look towards that which rules in the astral body and finds its embodiment in the physical body, we have something that is not so spiritual, so super-sensible, but something that melts from the sense-perceptible into the super-sensible. For the part that falls away from the human embryo becomes so to say more and more atomistic. The nearer the human being approaches birth the more it dissolves materially and becomes increasingly spiritual. For that which is attached to the human being as astral body and etheric body has originated through the spiritualising of those parts of the embryonic sheaths which fall away.