The point of preaching
Centered on recent events, preaching inevitably loses most of its transformative power. From apostolic times, the task of preaching has never been a matter of providing a “religious insight” into what’s going on, a new slant on what everyone already knows. The purpose of apostolic preaching was to announce an event that, according to Paul, no one could know without a preacher. The point of preaching is not to answer questions that are already circulating. The point is to challenge the entire worldview that gives rise to those questions, and to announce the reality of a new world in which all the old questions have to be reformulated or discarded altogether.
Peter J. Leithart, Of Preaching and Newspapers.