Divine Inspiration

[GrandizerII]

I would wager a bet that if you called the average Western Christian a polytheist, they'd be confused and offended. Perhaps it's just lack of refined teaching or exposure to other perspectives or beliefs.

"We believe in one God, the Father Almighty, the maker of heaven and earth, of things visible and invisible. And in one Lord Jesus Christ, the Son of God, the begotten of God the Father, the Only-begotten, that is of the essence of the Father. God of God, Light of Light, true God of true God, begotten and not made; of the very same nature of the Father, by Whom all things came into being, in heaven and on earth, visible and invisible...We believe in the Holy Spirit, in the uncreated and the perfect;... "
This is not modalism. 3 beings (in relation) one nature (in essence). It's not like it's that difficult of a concept. Using a more ironic example than the shamrock, let's use Cerberus. One dog, three dog heads; each independent but in essence one. Similar to Tertullian and Aquinas thoughts on the subject.

I disagree that it's not that difficult of a concept. In trying to force the Trinity to make sense and make it not sound so difficult, some Christians have resorted to a form of polytheism, modalism, or "tripartism", while sincerely believing they're holding to the mainstream Trinity doctrine.

Again, the Trinity is one God (one being), the Father is that one being, the Son is that one being, the Holy Spirit is that one being, but they are each distinct from one another in the sense that the Father is an "I", the Son is another "I", and the Holy Spirit is yet another "I", but it is nevertheless the same one being/entity. The Father is not a part/head of God, and neither is the Son or the Holy Spirit. So neither the shamrock example nor the Cerberus one accurately illustrates the concept of the Trinity.

In other words, God is not greater in totality than any of the Persons of God.

This is a good link to read for a proper understanding of what the Trinity is NOT:
https://www.desiringgod.org/articles/wha...he-trinity