Why do we listen to sermons? Where did sermons come from? How has preaching managed to survive and thrive across so many years and in so many cultures? Most Christians listen to a sermon every week. But what is a sermon? How does it relate to the Bible, and how does the Holy Spirit work through the 354 million new sermons that are preached every year? This book makes the claim that the Spirit of God likes to work through the Word preached. As it explores that claim, it looks at the history of preaching and current-day practices. It provides insight into what a sermon is, what it should be, and how those who listen to sermons can evaluate what they are hearing. It explores the mystery of preaching and the ways in which the Bible and the sermons that are preached from it continue to surprise us.