ISBN-13: 9780880106146 / Angielski / Miękka / 2007 / 162 str.
8 lectures, Dornach, December 2-22, 1917 (CW 179)
With a single observation, Rudolf Steiner can sometimes outline a radically new reality that changes everything. Here, he introduces these extraordinary lectures by proposing that the boundary between the physical and spiritual worlds "lies right in the middle of the human being."