Logically a spiritual absolute would be the essence of sentience, from which we rise, not an ideal of wisdom and judgement, from which we fell. The light shining through the film than what the images on it are doing.

Ideals are not absolutes, but the Ancients were practical minded. Basically the Big Guy in the sky validates the rule of the Big Guy on the ground. Divine right of kings.

Remember democracy and republicanism originated in pantheistic cultures. The family as godhead.

The Romans went monotheistic around the time the Empire was rising from the ashes of the Republic.