People tend to always bring Paul's comment in 2Timothy as proof that the bible is the inerrant word of God BUT it doesn't really matter what Paul thought or anyone for that matter.
It certainly doesn't matter to me.
I hold the bible as sacred and divine because I choose to, period.
Paul's statement, by the way, was simply that because the bible was inspired by God that it IS useful for :
teaching, for reproof, for correction, for training in righteousness.
That is all that Paul said.
IMO, certain parts of the bible are EXPLICITLY inspired ( Where God actually says something or reveals something in a divine way or when Christ is recorded as speaking) others are IMPLICITLY inspired such as secondary comments about what God said or Christ said and others are simply the writings of inspired men ( the epistles typically).
Look at the Gospel of Luke, does Luke say his writings are inspired?
Nope, what he says is this:
Inasmuch as many have undertaken to compile an account of the things accomplished among us, 2 just as they were handed down to us by those who from the beginning were eyewitnesses and servants of the word, 3 it seemed fitting for me as well, having investigated everything carefully from the beginning, to write it out for you in consecutive order, most excellent Theophilus; 4 so that you may know the exact truth about the things you have been taught.
Luke states that He is passing on what was handed down to Him (Us Apostles) from those that were eyewitnesses.
The GOL IS an inspired writing because we have in it the words of Christ and Luke was most certainly inspired by the HS to collect these accounts and pass them on ( Thank the Lord He did).
BUT was Luke under the direct influence of God when He wrote?
He doesn't seem to think so.
This does NOT, IMO, make His writing any less inspired then the others BUT does make them of a different kind of inspiration than the writings of Isaiah for example or John ( Revelation).