Levi was a priest before he studied the Occult, seems his curiousity had gotten the better of him, or his mind.
He along with so many others purposely omitted vital steps in certain rituals, none the less it still makes for a good read.
As is certain for one who decides to embark on a jorney of this sort, be rest assured "All That Glitters Is Not Gold" a mundane warning for the Neophyte, for the Adept, I would caution you concerning "That Which Is Hidden".
peace
Ublisi