One thing I have learned over the last 5 years or so, is that occult knowledge which the uninitiated think is supposed to be interpreted as symbolic or allegory, is actually entirely literal; the "underworld" is a real physical location (Hollow Earth), "archons" are actual entities (or even humans) guarding this prison planet and "the great serpent" is a real worm squiggling and writhing inside the gut or brain of those possessed by 'him'.