Farseer describes the nature of the Gods

• Dark Imperium [Godblight]:

"The C’tan, as far as our legends attest, were essential components of creation hungry, evil to mortal eyes, but part of it. They require no belief to live, in the same way the suns they devoured require no observer to be. Nor do the great four gods of Chaos, who have become so all-powerful they are in essence self-sustaining, though the faith of their followers makes them stronger. Nor does the Great Devourer, the mind of the tyranids, a being that is generated by the unthinking actions of its physical component parts, and that is perhaps greater than all the rest."