"This essay does not respond to postmodernism systematically. That would demand quite a different piece. Still less have I attempted to sketch an alternative Christian epistemology, although astute readers will detect the direction I would take. My point has been simpler. Informed Christians will neither idolize nor demonize either postmodernism or modernism. Both are founded on profoundly idolatrous assumptions. And both make some valuable observations that, when they are properly integrated into a more biblically faithful frame of reference, enable us to reflect fruitfully on the world in which we live."
Read the remainder of the article here. Consider also Carson's larger treatment of postmodernity The Gagging of God.