I had a DM make a setting where the creation myth was that a single blinding light split into all of the gods and the world. My character worshipped the sun god believing it to be the remnant of that original light. His cult believed that the sun god, of its own mercy and love for creation, gave the other gods equal power to its own. This moment of love for the world inspired my cult to revere the sun god as the *true* god, and the others as its children