Cannot expository preaching fall into one of these three categories ? Expository preaching aims to expound upon a particular passage, in context, within one sermon. It would depend, to a large degree, upon the passage as to whether the sermon itself might be inspirational, etc. In my experience, the expository approach can’t be limited to the categories you list, any more than the Scriptures can be limited in that way. Maybe it depends on what the motivation of the speaker is. Exactly what does he want his preaching to accomplish. The goal of expository preaching is to produce biblically well-informed disciples of Christ, who are themselves able interpret the Scriptures in context, properly handling the word of truth. I suppose some may have an agenda other than expounding the Scriptures, but such would be a real betrayal of the core concept of expository preaching itself. I am persuaded there are some preachers who feel threatened by biblically well-informed disciples of Christ, who are themselves able interpret the Scriptures in context, properly handling the word of truth