Kult revolves around the occult and has lots of inspiration from real life sources (mainly gnosticism and kabbalah I would say, but there may be others). This is nothing new, but I wondered how many of you who actually research authentic occultism to use it in the game.
Myself, I've been inspired by ritual magic (mainly enochian but also goetia) and reniessance spiritual alchemy when considering the awakening. I've also tried to make use of actual gnostic and kabbalistic texts (like the nag hammadi gospels and hebrew classics as the Zohar and Sefir Yetzirah).