Just a question. I recently got Mystery Cults (and I love it, as I mentioned in another post), but I'm not sure on what the Mystagogue is. Now, I havn't read the entire book, and this might be covered in The Mysteries Revised (when is that due, anyway?). So am I correct in that the Mystagogue is a higher ranking magi in the mystery, who's helping the initiate to learn the mysteries?
Mystagogue is the teacher, the leader of the Initation rite
Initiate is the pupil who is drawn further into the Cult, and in this case also acquires a new Virtue as a reward
Nearly always the Mystagogue is indeed a higher-ranked magus in the cult, one who already possess the Virtue - but it need not be so. In the extreme case, it can be the same person as the Initiate (self-Initiation) where they must also struggle against the Mystagogue not knowing the Virtue.... but that is, for instance, a way in which new Initiations can be developed.