Fifteen public lectures held in Berlin from 10 October 1907
until 14 May 1908, and on 3 December, 12 December 1907 and 18
March 1908 in Munich
Translation of volume 56 of Rudolf Steiner's Complete Work,
original title: Die Erkenntnis der Seele und des
Geistes, edited by Rudolf Steiner-Nachlassverwaltung
Dornach (Switzerland), second edition 1985.