Description 10 lectures in D sseldorf, April 12-18, 1909; notes by participants from question-and-answer sessions (CW 110) April 21 - 22, 1909 Ever since nature and consciousness were separated during the late Middle Ages--giving rise to scientific thinking that considers only the physical world and views the mind as merely an epiphenomenon of neural chemistry--the spiritual beings who are the universe have felt abandoned and unable to complete their work, w.