from Wiktionary, Creative Commons Attribution/Share-Alike License.
basis, foundation, primary principle, cause, or factor; a primal cause or ultimate cosmic principle
from Wiktionary, Creative Commons Attribution/Share-Alike License
Maybe you don't need the spirits and souls as non-material substances (surely an oxymoron); suppose you can just ... tap into the urgrund, datamine it, upload the personality pattern of, say, an early Christian called Thomas, replete with koinos Greek vocabulary ... if you're someone like Phil Dick, that is.
That urgrund is, I guess, the Vellum of my first book.