“Teach, delight, move.”.
One of the greatest preachers in the history of Christianity, St. Augustine was the first to deliberately apply the principles of Ciceronian rhetoric (teach, delight, move) to Christian preaching. For Augustine, preaching is fundamental to the work of the Church, engaging and teaching people with the Word of God in order to change them. And that’s what we see from the very beginning as the apostles followed the example given to them by Jesus: They engaged and taught people in order to change them to become more like Christ. That’s it. The Word of God has the power to change people.
See Michael and Tom talk about message preparation and series preparation: