Edwards concludes the book by outlining eight aspects of deep sermons and six aspects of deep preachers. This section of the book is basic and could have been improved by at least offering suggestions on how preachers might go about writing deep sermons, but having said that, it is insightful and helpful for preachers who are interested in putting Edwards' wisdom into practice.
I really enjoyed reading this book and I will undoubtedly benefit from it as a preacher. Edwards is articulate and creative, and obviously practiced what he preached in the writing of this book--that is, he prayed, meditated, and fasted as he wrote, it's pretty obvious. Although much of his wisdom for preaching is old wisdom, his plea to come away and spend more time with the Lord is magnetic. Surely the impact of this book upon my life is that I will indeed invest more minutes--more hours--in the presence of Jesus as I prepare to preach and this will glorify God, help others, and augment my joy.
If you're a preacher, or think you might want to be, you should read this book. It's worth every penny and whatever time you'll invest in reading it.