Expository biblical preaching means that the Bible is in the driver’s seat; it dictates both the content and the course of the sermon. In many churches, and in the sermons preached in them, the Bible is in the trunk, hidden away, largely forgotten, effectively irrelevant. In others, it is a passenger in the back seat, like any back seat driver offering advice, usually to the irritation of the man behind the wheel. … But frequently the Bible is in the passenger seat—up front where the action is, useful for observation of the road, map reading and navigation, an interesting conversationalist, but not driving the car. The preacher is doing that and the Bible serves his purposes. But in expository preaching the Bible does the driving and the preacher is captive to the text.
‘Preaching that Connects’ – Trinity Journal.