A course of 18 lectures and discussions given in Dornach, Switzerland in 1921. In this course, in which more than one hundred people interested in the questions of a renewal of religious life and work participated, Rudolf Steiner talks about the ways in which religious activity can be fertilized through spiritual knowledge and brought into new forms of worship. The "Documentary Supplements" included in the separate German edition containing reproductions of blackboard drawings and addresses, notebook entries, etc., is included in this English translation.