[taxcontrol]

Biblical authority... none or at least no more than any other man who hears the word of God.

Political authority - because the Roman Emperor Constantine, who was a pagan until his death bed, wanted to consolidate the multiple different belief systems of Christianity at the time into a single belief system.

[Notwithstanding]

So, some guys - with the same authroity that you and I have - got together and said: "Hey folks, this stuff is not just good stuff, it is God's Own Word." And today we are bound to accept this decision by a bunch of Christians with no special authroity forever?

That makes no sense. You must have some other reason to think these ordinary men were able to make such a profound and definitive declaration that certain letters were God's Word, and other letters were not.