Modalistic Monarchianism, also known as Modalism, is the view that God variously manifested Himself as the Father (primarily in the Old Testament), other times as the Son (primarily from Jesus? conception to His ascension), and other times as the Holy Spirit (primarily after Jesus? ascension into Heaven). God is not three Persons. Rather, Modalistic Monarchianism / Modalism teaches the God has simply revealed Himself in three different modes. Modalistic Monarchianism / Modalism is also known as Sabellianism, named after Sabellius, and influential early proponent of the view. Yet another aspect of Modalistic Monarchianism / Modalism / Sabellianism is Patripassianism, which is the view that it was God the Father who became incarnate, suffered, died, and was resurrected. Patripassianism essentially teaches that God the Father became His own Son.
I am sure you all know what trinitarianism is. hahaha, here it is just in case since your absence from the BORG, you have forgotten
Christology:
Modalism - (Modalistic Monarchianism) The belief that God is one, this one God has revealed Himself to mankind through various manifestations or modes, the manifestation (role) of the Father, the Son, and of the Holy Spirit. God has the ability to reveal Himself in different forms to His creation and at different times. I do not see how this can be interpreted as Polytheism, this Christology fits accordingly with the basic rules that interpret monotheism (belief in one God).
Oneness - Basic monarchianist modalism .
Trinitarianism - (Athanasianism) - probably the most popular but certainly not truthful, it believes that God is three seperate persons, God the Son, God the Father, and God the Holy Spirit. I can't help but believeing this to be pure pagan polytheism (belief in multiple gods).
Arianism of Arius - (Jehovah's Witness and Unitarian) The Christological views of Arius (280?-336), a priest at
Subordinationism - Belief that one person in the Godhead is subordinate to or was created by another person in the Godhead. Of course this presupposes a belief in the plurality of persons in the Godhead (polytheism). In early Trinitarians, it surfaced as the belief that the Logos is the divine Son and is subordinate to the Father. This was the view of some Greek apologists, Tertullian, and Origen. Arianism is an extreme development of this doctrine (Jehovah's Witness and Unitarian). Also, the term applies to any belief that the Holy Spirit is subordinate to the Father or the Son. Orthodox Trinitarians is expressed by the Nicene and Athanasian creeds theoretically rejects and form of subordinationism, but the tendency towards it remains. (Most of today's Trinitarians view Christ as subordinate to the Father, thus neo-Trinitarians contains the subordination doctrine.
Obviously, you can believe Jesus is God, without being a Trinitarian, so the whole argument that anti-Jesusists use is, oh your're one of those pagan Trinitarians. WRONG! Trnitarianism is pagan, but I'm not one of them, and Jesus is still God.
Now, I agree with the Watchtower teaching that trinitarianism is pagan Polytheism but it is clear that you can believe Jesus is God Almighty without being a trinitarian.
Further, I would like to add:
John 15:13 Greater love hath no man than this, that a man lay down his life for his friends.
Notice that it doesn't say the greatest act of love is for a man to send his son to die for his friends?
The bible tells us that the greatest act of love is for a man himself, to die for his friends, so why would it be any different for God?
The greatest act of love for God would be for God to die for His beloved creation.