I like to think it’s really pretty simple and straight forward because point #5 (They are one God) is just wrong. It blatantly conradicts point #4 (The Father is God. The Son is God. The Holy Spirit is God).
The only way to remove the contradiction is to change point #5 from “There are not three Gods but only one God” to “The Father, Son and Holy Spirit are one in purpose and form a Godhead”
That appears to summarize the LDS position: a
functional oneness (c.f. Fr. Ladaria’s quote in post
197).
They are one in purpose, and so, in what we could call, the “functional model”, this community of Father, Son and Holy Spirit is denoted with the term “God” (or “Godhead”), in the singular. However, in substance/nature/being they are three, the exact same way three human beings can be one in purpose, yet in essence remain three separate entities.
The implication with the functional model, therefore, is that the Father, Son and Holy Spirit are essentially
three Gods– each person is fully divine because each possesses his own separate divine “equipment”, so to speak.
To summarize, there would be one God functionally and three Gods essentially.
As is quite apparent at this juncture, the Latter-day Saint understanding of the Godhead is very different from the Catholic understanding of the Trinity in regards to point 5 (Cf. post
14). For Catholics, the Trinity is essentially one, and thus, “functionally” one (Cf. divine appropriations <
here> and <
here>).
I would also note that this discussion is leading me to believe that one of the reasons why the Catholic Church explicitly excludes the term “share” (i.e. “the divine persons do not share the one divinity among themselves. . .”
Post 15, point 1) is because the term suggests that the three persons are separate in essence: three beings-- thus, three Gods.
Trinitarian theology holds, as we have said, that Father, Son and Holy Spirit are distinct, but not separate.