It would also be pertinent to note that it was not up to those mortal men as to how wide spread and internalized their writings would become, neither did they envisage that those inspired words of God would find themselves into the hearts of men, throughout the last 2000 years and in peoples of every nation and in every language.
The indication that this would happen is in the Revelation of Jesus, given to John to give to the 7 Churches in Asia Minor, within the 1st Century context.
10And
I took the little book out of the angel's hand, and ate it up; and it was in my mouth sweet as honey: and as soon as I had eaten it, my belly was bitter.
11And he said unto me,
Thou must prophesy again before many peoples, and nations, and tongues, and kings.
(Revelation 10)
This little book is the after the fact evidence for you, that it is authorized not by those mortal men who put ink to paper, that hadn't the slightest clue to how far and wide in future generations around the world it would spread.
However, now you know that the authority is not of those mortal men and to associate the authority of the book with those mortal men is the mother of all fallacies!