Pastors should only bring as much extrabiblical information into their sermons as will serve the purpose of illuminating, explaining, and applying the text.
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More than once, I’ve sat under preaching that claimed to be expositional but was only a weak impersonation.
Expository preaching makes the point of the text the point of the sermon, nothing more and nothing less. This definition doesn’t preclude additional points of emphasis, application, or creative illustrations. But if the sermon doesn’t make the text’s main point its main point, it’s less than expositional.
