15. Spiritual Science, Natural Science and Technology

Thus one says – and I say expressly, with a certain right – from a scientific point of view: That which is the physiological formation of the brain is what, in the end, is expressed in the function of thinking. The person who has experienced what I have characterized does not say it that way; they say: Just as these grooves and furrows are not raised from within by the earth's inner forces, but rather as if something has passed over them, so the physical brain has been placed in its furrows by the body-free thinking. And that which, in a certain way, when we entered physical existence through birth, changes these furrows, that is also what, descending from spiritual worlds, does the work of shaping these furrows in the first place.