It's just a blend of kabbalah lore (Hermetic and Jewish) https://lemmygrad.ml/post/12538409/8594703 and lore that's arisen from Dylan's All Along the Watchtower lyrics, as a result.

It gets pretty deep and intricate, I've been interested and studying it for several years, as time and interest waxes and wanes, but if you're inclined, here's a crash course that almost scratches the surface:

https://m.youtube.com/playlist?list=PLZ__PGORcBKxbM4y3wcYSObaUsr4guYAn