The problem with monotheism is that ideals are not absolutes.
Truth, beauty, platonic forms are ideals. The core codes, creeds, heroes, narratives at the center of every culture are ideals.
The universal, on the other hand, is the elemental. So 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 and animating the film, than the stories playing out on it.
Morality is an ideal. Those creeds and codes that enable healthy societies. If they were absolutes, they couldn't be transgressed, like a temperature below absolute zero.
The Greek pantheistic religion originated out of fertility rites. The young god born in the spring to the old sky god and earth mother. Though by the time of the Olympians, Zeus didn't give way to Dionysus, tradition prevailed over renewal. Which provided fertile ground for the story of Jesus. The origin of the Trinity.
To the Ancients, monotheism equated with monoculture. One people, one rule, one god. Ancient Israel was a monarchy.
Democracy and republicanism originated in pantheistic cultures. Many ideas and ideals competing.
Constantine adopted Christianity for the monotheism, as the Empire finally coalesced, several hundred years after the Republic collapsed. The Big Guy Rules. Providing the eschatological basis for the next 1500 years of European monarchy. Divine right of kings. As opposed to consent of the governed. When the West went back to democracy and republicanism, it required separation of church and state, culture and civics.
Religions, as mass expressions of belief, are highly politicized. Stick to the spirituality.
One is the node, oneness is the network.
The reason the New Testament supplemented the Old Testament was the Bronze Age tribalism it represented needed to expand beyond just one group. "Do unto others, as you would have them do unto you." What goes round, comes round. Karma.
"Turn the other cheek, because two wrongs don't make a right.