[Sidenote: Expository Sermons Defined]
Expository sermons differ from the textual not so much in kind as in degree. For example, the text is usually longer, and more attention is given to the explanation of the words. The text, indeed, may cover several verses, a whole chapter, or parts of more than one chapter. And the treatment need not necessarily be confined to the definition of words, but include the adjustment of the text to the context, and the amplification and illustration of the various ideas suggested.
Dr. James W. Alexander, from whose Thoughts on Preaching I draw generously in what follows, says:
[Sidenote: The Notion of a Sermon]
"Suppose a volume of human science to be placed in our hands as the sole manual or textbook to elucidate to a public assembly, in what way would it be most natural to go to work? Certainly we would not take a sentence here, and another there, and upon these separate portions frame one or two discourses every week! No interpreter of Aristotle or Littleton would dream of doing that. Nor was it adopted in the Christian Church, until the sermon ceased to be regarded in its true notion, as an explanation of the Scripture, and began to be viewed as a rhetorical entertainment, which might afford occasion for the display of subtlety, research and eloquence."
[Sidenote: Inspired Sermons]
The same author recites some interesting facts that might be summed up under the general head of the history of expository preaching. For example, he reminds us that as early as the time of Ezra we find the reading of the law accompanied with some kind of interpretation. See Nehemiah 8. In the synagogues, moreover, after the reading of the law and the prophets, it was usual for the presiding officer to invite such as were learned to address the people, and it was in this way that our blessed Lord Himself—as well as His apostles, subsequently—was given the opportunity to open up the Scriptures. See our Lord's discourse in the synagogue at Nazareth, reported in the fourth of Luke, and observe that it was an expository treatment of Isaiah 61. Notice, also, the discourses of Peter and Paul in the book of the Acts.
[Sidenote: The Christian Fathers]
The early Christian assemblies adopted this method in their religious services, as we may judge from allusions and examples in the writings of Justin Martyr, Origen, Augustine and Chrysostom. Their homilies, especially in the instances of the last mentioned two, were usually of the nature of "a close interpretation, or running commentary on the text, followed by a practical application." Chrysostom, quoted by Neander, says: "If anyone assiduously attend public worship, even without reading the Bible at home, but carefully hearkening here, he will find a single year sufficient to give him an intimate acquaintance with the Scriptures." In how many of our churches could the same be said to-day? But ought it not to be said in all?
Dr. Alexander is further sponsor for the statement that it was about the beginning of the thirteenth century when the method of preaching from insulated texts came into vogue, and the younger clergy adopted subtle divisions of the sermon. And he says, too, that it was warmly opposed by some of the best theologians of the age, as "a childish playing upon words, destructive of true eloquence, tedious and unaffecting to the hearers, and cramping the imagination of the preachers." He is not prepared to entirely accept this criticism of the theologians, however, nor am I, believing that both the topical and the textual methods of preaching have their attractions and advantages. [Sidenote: The Reformation Period] Nevertheless, it is a pleasure to record that "when the light of divine truth began to emerge from its long eclipse, at the Reformation, there were few things more remarkable than the universal return of evangelical preachers to the expository method. Book after book of the Bible was publicly expounded by Luther, and the almost daily sermons of Calvin were, with scarcely any exceptions, founded on passages taken in regular course as he proceeded through the sacred canon. The same is true of the other reformers, particularly in England and Scotland." In the times of the Nonconformists the textual method came into practice again; but, notwithstanding, exposition was considered a necessary part of ministerial labour. Matthew Henry is a conspicuous example of this, who, although he frequently preached from single texts, yet "on every Lord's day morning expounded a part of the Old Testament, and in the evening a part of the New, in both instances proceeding in regular order."