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" The three “undervalued" components of expository sermon preparation include introductions, illustrations, and conclusions. Due to the complexities of pastoral ministry in general and message preparation particularly, pastors tend to let these three slide. The congregation, in contrast, eagerly looks forward to how its pastor will handle these elements of the message. This discussion, which intends to equip the preacher for a new level of expository excellence, is built around purposes, sources, variations, guidelines, and preparation tips for these three parts of an exposition. "
― John F. MacArthur Jr. , Preaching: How to Preach Biblically
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" The essential ingredient in dealing with central ideas, outlines, and titles in expository preaching is an understanding of the structure of the passage to be preached. The expositor should not communicate his own central idea, nor his own outline, nor his own title. He is, rather, to teach the central idea, outline, and theme of the author. Failure to reflect the author's theme, outline, and central idea is a departure from true exposition. "
― John F. MacArthur Jr. , Preaching: How to Preach Biblically