'This biblical understanding of our falleness - cursed yet still sustained by non-salvific grace - is crucial for relating Christ to culture. The world is inherently good and sustained by common grace - yet it is cursed. Christians are redeemed and saved - yet they are still filled with remaining sin. The battle line between God and idols not only runs through the world; it runs through the heart of every believer. So the work and cultural productions of Christians and non-Christians will have both idolatrous and God-honoring elements in them. Cultural products should not be judged as "good if Christians made them" and "bad if non-Christians made them." Each should be evaluated on its own merits as to whether it serves God or an idol.'
Timothy Keller, Center Church, p.227.
