Occult Science and Occult Development
GA 152
  
These lectures reveal the Christocentric nature of Steiner's teachings and show the Incarnation of Christ as the pivot of cosmic and human evolution.
Translated by Dorothy S. Osmond
| I. | Occult Science and Occult Development | May 1, 1913 | 
| II. | Christ at the Time of the Mystery of Golgotha and Christ in the Twentieth Century | May 2, 1913 | 

