I don’t understand what you intend by this phrase? Unless you are affirming that it required a Council to determine Cannonisity of the Books of the Bible.*
Peace,
PT
PT
What I am trying to say is this: It seems as if Catholics try to legitimize the infallible and indestructible teaching authority of the Roman Catholic Church (whereas earlier on it was never called that) because they wrote and chose the Canon, because they developed and dogmatized the trinity, because they solved the arian controversy, because they settled disputes etc,etc
And this all took place not by virtue of who these people were themselves as people, but any so far as they had the ability to preserve the truth of the apostles doctrine.
You say that the apostles are silent about the 66 books of the Old & New Testaments. Well, if the 12 apostles were looking on, in spirit, to the councils of which confirmed the canon, they would not have been dumbfounded as to how the Bishops arrived at their conclusion. The apostles knew that there would have to be some major effort to preserve their original gospel message, and to find those writings which lie as close as possible with the 12 apostles (including Paul) would help in that effort of maintaining the apostolic pure doctrine. Can you imagine the Apostles in heaven looking to the council saying “Oh, well they are trying to find those writings which either we wrote or our counterparts wrote, in order to keep themselves in the truth and to secure a standard for the Catholic church…hmmmm…that makes sense”. They would not have said “Wow! Look at the authority of the Catholic Church, these men are mighty in Spirit enough to choose out of their own liking which books go into the Canon!!!”. This canonization was not a whimsical decision made by men who decided so because they thought some mystical authority lied in their spontaneous decision. Rather they employed the same methods that any historian at that time, given the right mission and logic, would have employed.
As far as the Trinity goes, what is developed? If you are willing to concede the the apostles did not teach that God the Father was God, the Jesus the Son was God, and that the Spirit was God, then you have just opened yourself to a doctrinal creation after the era of the original apostles. If however you say that there is a development on how Christians should understand this, I would say the Bishops carried a tradition of a way to understand this that kept the original doctrine there intact and unaltered. This is not a development of doctrine, but rather a development in ways to understand the same doctrine that had been there already.
This is getting kind of far out there. But For the Church in her mission to keep the apostolic truth pure in their life employing the method to choose those writings which most fitly qualify is anything but a new doctrine, for no one, not even the original 12 would have been baffled at the council, but they would have understood.