Keller: Preaching to Believers/Unbelievers

Tim Keller gave a lecture at Covenant Seminary in 2004 on Preaching to Believers and Unbelievers.  He deals with a few very important points.  One of them is about the power of the preaching event over the moralistic application of the sermon (evidenced by taking notes).  I have quoted Keller on this issue recently.  He also deals with Deconstructing Defeater Beliefs in the lecture.  Give it a listen.