From an interview with Kevin Vanhoozer:
The problem in too many evangelical churches is that we know what we're supposed to believe, but we're not sure what practical difference it makes and so we're unable to bring it to bear on everyday life. To be sure, biblical and theological illiteracy remains a problem too. But that doesn't really explain why even in churches where the Bible is faithfully preached the congregation doesn't look that different from everyone else.
My own hunch is that we need to recover the imagination in order to set the cultural captives free. I believe that many people in today's society, and church, suffer from an impoverished imagination. By imagination I mean the cognitive power of seeing things together, as wholes; clearly a worldview is an affair of the imagination, at least in part. In any case, I believe that our imaginations are captive to secular stories/worldviews that do not nourish our souls. Eugene Peterson says something similar about the function of the 10 plagues of Egypt: they were intended to free the imagination of the Israelites from thinking that the power of Egypt was sovereign. The plagues systematically deconstruct Pharaoh's power. It takes imagination to see that what God is doing with a small tribe of slaves is greater than the might of Egypt or the grandeur that was Rome. Similarly, it takes imagination to see that North Americans are not in bondage to similar powers and principalities: consumerism and therapism, to name but two. I wonder whether in our haste to preserve doctrinal truth, we have not done our evangelical churches a disservice in surrendering our imaginations to stories (and advertisements) that serve the interest of some worldly empire (or multinational corporation) rather than the kingdom of God.
Pastors need to make it a priority to teach their congregations how read Scripture theologically, and this requires the imagination, the ability to make sense of thing by fitting the little bits into larger patterns – the big canonical picture. It takes imagination to see the Bible as a unified whole, and then it takes even more imagination to fit one's own time and place into this biblical drama of redemption.