'Every human culture is an extremely complex mixture of brilliant truth, marred half-truths, and overt resistance to the truth. Every culture will have some idolatrous discourse within it. And yet every culture will have some witness to God's truth in it. God gives out good gifts of wisdom, talent, beauty, and skill completely without regard for merit. He casts them across a culture, like seed, in order to enrich, brighten, and preserve the world. Without this understanding of culture, Christians will tend to think they can live self-sufficiently, isolated from and unblessed by the contributions of those in the world. Without an appreciation for God's garcious display of his wisdom in the broader culture, Christains may struggle to understand why non-Christians often exceed Christians in moral practice, wisdom, and skill. The doctrine of sin means that as believers we are never as good as our right worldview should make us. At the same time our doctrine of our creation in the image of God, and an understanding of common grace, remind us that nonbelievers are never as flawed as their false worldview should make them.
This suggests that our stance toward every human culture should be one of critical enjoyment and an appropriate wariness.'
Timothy Keller, Center Church, p.109.