For instance, the Geo fragment for Rex Lapis says "The currencies that flow through this land are my flesh and blood."
Actually, there's more lore in that manga I linked. The prologue chapter gives some details about Celestia, the land the gods ascend to. Once you become a god, those descriptions of "blah blah are my flesh and blood" LITERALLY mean that those are his literal flesh and blood. Everything that was created was from the body of a god. This really makes the descriptions and legends more uh, "interesting" when you think about it.
Another interesting tidbit, the archon names we've gotten so far, Barbatos and Morax (Rex Lapis's other name), are both demons from the Lesser Key of Solomon. Interestingly, so is Paimon. Wonder what that all means...