The Bible is inspired by God. What does this mean?
Simply put - "What the Bible says, God says."
Some say that the Bible is inspired, but they are not comfortable saying that the Bible is the very words of God. They have some looser, stranger view of inspiration.
What the Bible says, God says. Can we give this a hearty "Amen"?
I don't think this can be easily understood without understanding the big picture first. In the end it boils down whether you believe an almighty God being behind the Canon, or you believe that no God or an incompetent God standing behind.
So the OP poll should actually be who is possibly behind the Bible Canon?
1) an Almighty God
2) an incompetent God
3) no God
The big picture,
God can't show up in front of humans due to the final covenant between God and men specifies that humans need to be saved by faith. If He shows Himself up, humans as a whole will thus be deemed unsaved.
However if He doesn't show up at all, humans don't even know that such a covenant exists. The only way which works is for God to show up in front of His chosen eyewitnesses, and for their testimonies to be written down for the rest of humankind across history to believe with faith.
The crafting of OT involves multiple accounts of witnessing based of God's chosen prophets in the different period of time throughout the Jews' history in testifying and portraying God with the same characteristics, and in reflecting the updating of the Jewish covenants. As a matter of fact, the Jews as God's chosen people are the chosen witnesses for all to be conveyed.
The corresponding canonization took long to complete due to the need for witnessing from different period of time. The process of canonization is supposed to start with King Hezekiah till after Jesus, even though John the Baptist actually marks the end of the proclaiming of OT, legally/lawfully speaking.
The same process for NT is relatively short, because it is about the testifying of Jesus with a final covenant between God and men.
Inspiration is basically about how a book is written with God standing behind. Testimonies are about the gathering of information from eyewitnesses accounts. It is similar to how human history being written. Historians are not necessarily eyewitnesses in all the situations recorded down. They are supposed to be gatherers of information from eyewitnesses accounts. It's similarly to today's news reporters and journalists.
Within the same process, Satan won't stop working either. That drives the need of canonization. God is behind the canonization such the valid books are defined.
In the end, the writings are about a whole theology of who God is, who His covenants and Law are. Even when this theology can be written through inspiration, the next question is how should this theology be conveyed throughout the history of humanity. The only way is by means of a religion, such as Judaism and Christianity. This is already the best capability of what humans can do!
God is doing the job through the best capability level of humans in terms of how things are witnessed, recorded down, kept and conveyed with a theological (not necessarily contextual) accuracy, such that even the most stupid human can understand the salvation message correctly, and for every single human to be judged in accordance to what is said and conveyed.