Why Preach draws from the author's rich understanding of the Word of God as the challenging, encouraging, and healing presence of Christ, as well as from his own experience as both a preacher and a teacher of homiletics. With an eye focused on the works and examples of Pope John Paul II and Pope Benedict XVI, Father Cameron illustrates that good preaching derives from and leads to an encounter with Christ, the Word of God made Flesh, who comes to us through the Scriptures.

The objective of the book is to help preachers to think about preaching in a new, dynamic way. Its aim is to provide a fresh and helpful vision of preaching geared to deepening a preacher's appreciation of what preaching is, and the great spiritual impact that good preaching can have on its audience, so as to increase his desire and ability to preach well.