"All scripture is inspired by God and is useful for teaching, for reproof, for correction, and for training in righteousness, so that everyone who belongs to God may be proficient, equipped for every good work" (2 Timothy 3:16-17). Equipped for every good work; there’s the point. The Bible is breathed out by God (the word for "inspired" in this case is theopneustos–literally, "God-breathed") so that it can fashion and form God’s people to do his work in the world.
In other words, the Bible isn’t there simply to be an accurate reference point for people who want to look things up and be sure they’ve got them right. It is there to equip God’s people to carry forward his purposes of new covenant and new creation. It is there to enable people to work for justice, to sustain their spirituality as they do so, to create and enhance relationships at every level, and to produce that new creation which will have about it something of the beauty of God himself. The Bible isn’t like an accurate description of how a car is made. It’s more like the mechanic who helps you fix it, the garage attendant who refuels it, and the guide who tells you how to get where you’re going. And where you’re going is to make God’s new creation happen in his world, not simply to find your own way unscathed through the old creation.
(Simply Christian, 182-183)