Dion Fortune’s The Cosmic Doctrine is a foundational text which has been required reading for students of the occult since it was first published in 1956. In it she attempts to explain the meaning and evolution of the cosmos from the first beginnings to our lives today. However its dense prose pregnant with meaning have made it a challenging read for many. John Michael Greer now provides a learned and elucidating commentary on this classic text to allow students and teachers alike to more easily digest and understand this fantastic book.