“The expertise that commentaries bring to bear on a particular passage is at one moment their greatest benefit and their greatest danger. The mixed blessing is evident in two types of pastors who will never make great preachers: The first will not listen to what others say; the other will say only what others say. A preacher who refuses to pay attention to what gifted scholars have discovered mistakes personal arrogance for erudition. God does not give all his insights to any one person. At the same time, a preacher who says only what a commentator concludes is trying to preach by proxy.”
–Bryan Chapell, Christ-Centered Preaching: Redeeming the Expository Sermon (Grand Rapids: Baker, 1994/2005), 74.