God's Word has the power to produce change. I enjoy reading the accounts of great revivals. As God's Word has gone forth in power taverns have been closed, prostitutes have gone home, and gambling casinos have gone broke. Yes, the Bible at work in life-changing power is evidence of its divine authorship. The text states that all Scripture is God-breathed, or inspired of God.
Inspiration includes both the whole and the parts.
I believe that a perfect God has given a perfect Word. The question of inerrancy is the theological hot potato of our day. Churches and denominations are being divided as this matter goes unresolved. All evangelicals believe in the inspiration of Scripture, but not all evangelicals believe in an inerrant Scripture. Some claim a kind of limited-inerrancy position.