Discussions of the Abramelin operation come and go here and like places often enough. I won't go into it in detail unless specifically asked to, but I do theorize that Abramelin was inspired to the Spiritual Exercises of St. Ignatius. A well-accepted English version of the operation can be found here.
I offer it to the readership to suggest that an academic comparative analysis between the two operations might be useful in general. I'm also interested to know if any readers here have attempted the Spiritual Exercises.