That would be your doctrinal basics; certainly not a basic doctrine of scripture or getting back to the basics of thread theme.
There are many more in heaven, but in reference to the Triune God, there are 3 persons, one God, yes.
Correct
No, and this is where, as you say
“Now it gets complicated” because Witnesses and Christians have a fundamentally different concept of God.
The WT envisions a God that lives
within our created universe, Christianity does not. The WT God has a fixed place and lives inside of space and time whereas in Christianity (and by this I mean the mainstream, historic Church) there is no such limitation.
Let’s go back to basics.
At one time the Watchtower taught that God lived on a star called Alcyone in the Pleiades star cluster which they believed was at the center of the Universe
The Pleiades, the centre of the universe, are located in Taurus, and as though to emphasize the foundation, the original meaning of Alcyone, one of the chief stars of the Pleiades, is "foundation". How significant that the whole universe should throughout the ages swing about that constellation and that star which alone picture so clearly the Ransom! The bullock offered on the brazen altar in the court was indeed the foundation: it represented the sacrifice of the Lord. The bullock in the sky represented the very same thing. (1914 International Bible Students Convention Report, pp. 252-253)
According to the WT, Jesus made an invisible visit to Brooklyn New York and approved your Organization in 1919. Thus, Jesus was happy with your doctrines as was the WT upon finding it was "Jesus approved". The Organization was also able to divinely channel that the WT was the sole Organization through which Jehovah would communicate with the world today, but none of these new communications, which would only be channeled to the "Faithful discreet slave" should be deemed as inspired. Correct?
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Judge Rutherford, the WT president that succeeded Russel, also approved and continued the Pleiades teaching:
The constellation of the Pleiades is a small one compared with others which scientific instruments disclose to the wondering eyes of man. But the greatness in size of other stars or planets is small when compared with the Pleiades in importance, because the Pleiades is the place of the eternal throne of God. (Reconciliation, J.F. Rutherford, p.14)
If what the WT says was true, then it is clear that by 1953
apostasy had entered the WT. They abandoned this "Jesus-approved”,
original teaching and declared the whole thing “without foundation”.
Some attribute striking qualities to these constellations or star groups and on the basis of such they then offer private interpretations of Job 38:31,32 that amaze their hearers...when viewed Scripturally they are completely without foundation. (The Watchtower 1953 November 15 p. 703)
Of course the WT forgot to mention that the
“Some” who offered “private interpretations” were none other than the WT and its past Presidents, which brings into questions why the Faithful Discreet Slave failed to faithfully communicate the divine truths God had communicated or channeled to them.
In any event, I am mentioning this because it demonstrates the
finite nature of the WT's version of God. In Christianity, God is infinite.
I demonstrated these two contrasting views of God here:
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As you can see, since the WT’s version of God occupies a point in space and time, he must leave one space to be at another. He is either in heaven or the womb of Mary, He is either in heaven or He’s in the arc, and when He’s here He’s not over there. This is why you can ask if the question about one person of the Trinity leaving heaven to be placed in the womb of Mary.
In the traditional Christian view such questions are meaningless. God is all-encompassing. He is everywhere. A simple glance at both illustrations shows that Christianity's view of God is infinitely more majestic than that envisioned by the Watchtower.
In my studies with Witnesses, I find they tend to envision Jehovah as an old man with a beard. In this they are in good company with how the Norse envisioned Odin, the Greeks envisioned Zeus, and how the Romans envisioned Jupiter. WT literature will often mention how loving Jehovah is, but when they actually illustrate Him I find He's generally shown destroying, devastating, or killing (either remotely or personally) in some form or the other.