Results of Spiritual Research CW 62, a winter cycle of fourteen public lectures by Rudolf Steiner. Given in the Architektenhaus, Berlin, between 31 October 1912 and 10 April 1913. Translated by Simon Blaxland-DeLange.
Lecture 1. How Is Spiritual Science Refuted? (Berlin, 31 October 1912)
Lecture 2. On What Foundation Is