Hi Ahanu —
If the first disciples taught the Trinity, why isn't this theological dispute recorded in Acts where their debates largely concern Jews?
I'm not sure the precise nature of the debate is ever properly recorded, nor do I think a precise theology of the Godhead existed at this time either.
The Jews' problem was quite simple. There is but one God, which this new, upstart cult agreed, but then they're worshipping Jesus, and according to all the stories, this Jesus is saying and doing things that only God can do!
And, what the heck are they getting up to, coming to Synagogue on Saturday and then creeping off for their Sunday Sabbaths?
The theology of Soteriology (how Christ saves), Christology (who and what Christ is), the Holy Spirit (what the heck,
another one?) was all very inchoate, more faith than fact, and these questions would occupy Christianity for the next few centuries, and be the cause of much dissent.
Over these centuries, the doctrines were worked out when attempts to explain the doctrine led to contradictory viewpoints. The Arian dispute, for example, arose over a very Platonic interpretation Scripture, basically a version of Platonic emanationism. (The various Gnostic disputes also foundered on this point, being an overtly anthropomorphic view of the Godhead, with the various higher 'syzygies' displaying the worst human traits — a critique Plato had levelled against the occupant of Mt Olympus.)
For Arius, Christ was neither God nor man, but some intermediate creation, more than human, less than God, but with all the attributes of God, but yet not quite God, but still someone to be worshipped, even though the Bible says God alone is the sole object of man's worship... His congregation complained ...
For the bishops of Nicea, asked to resolve the matter, the problem was perplexing, because nowhere in the NT does Our Lord actually define and declare the doctrinal statements they are looking for. Not all bishops, then as now, were theologians. Their problems were more pastoral.
So Christian doctrines evolved, from a profound contemplation of the Scriptures, the genius, inspiration and insight of the Apostles and the Fathers ...
For myself, this leads to an interesting situation. On the one hand I get criticised for believing stuff not explicitly stated in Scripture, whilst on the other, faith in the literal word is equally caustically dismissed. We can't win!
My foundation of Trinitarian belief is simple:
The divine is that which we describe as 'absolute', 'infinite', 'perfect', etc. All the transcendental terms. One can't be partly divine, any more than one can be a little bit pregnant, one either is or one ain't.
So where man is composite and contingent, the divine isn't. If the Holy Spirit is divine, it is all that the Divine is. It is not a partial divine or modal divine or subsidiary divine, if you see what I mean?
So where God speaks His word, there God is. A prophet never claims divinity, nor claims his own authority for what He says, other than being the oracle of God, but Christ went way beyond that. No prophet would dare to modify the decalogue without asserting that this comes from on high. No prophet can add his own Covenant onto the Covenant with the Father.
This is why I dispute with those who say man is inherently divine, that his inmost nature is divine. If it were, he would be absolute, etc. and because the absolute is infinite it cannot be limited nor contained. You can't be a contingent absolute, a 'relative absolute', any more than you can have two absolutes ...
I can be said to be a 'panentheist' on the condition that nothing in created nature is inherently divine, but the divine is immanently present in and two all created nature ...