Charles Simeon's Horae Homileticae is not your typical commentary. In addition to the practical chapter-by-chapter insight into God's word, Simeon also provides helpful outlines of sermons. These outlines, or "sermon skeletons", are intended to help seminary students and pastors get a jump-start on conveying the key priciples of a chapter.
The Horae Homileticae is both a commentary and an invaluable tool for sermon composition. Intent on letting the Bible speak for itself, Simeon truly does provide a useful structure for building great sermons while offering powerful lessons of his own at the same time. There are more than 2500 discourses and over 21 volumes filled with practical comments and obversations.
"This is the best place to go for researching Simeon's theology. You can find his views on almost every key text in the Bible." - John Piper (original source)