<p>Given his energetic involvement in practical initiatives and extensive lecturing, Rudolf Steiner had little time to write books. Of those he did write - belonging almost entirely to the earlier years of his work - four titles form an indispensable introduction to his later teaching: Knowledge of the Higher Worlds, Theosophy, The Philosophy of Freedom and Occult Science. The anthroposophy of Rudolf Steiner is not a theoretical system, but the r...