This book is essential for any Catholic man discerning a call to the permanent diaconate, and will challenge many preconceptions, beliefs, and assumptions about what that call entails. Likewise for lay readers, seculars, and the intellectually curious, this book is a short but intense deep dive into the concept of the "servant mysteries of Christ," or servant leadership if one prefers. It expounds on the Catholic Christian understanding of charity and service, and in particular blows the common perception of a permanent deacon as "some retired guy who helps out at Mass" completely out of the water. Like many truly deep philosophical and spiritual works, the shorter it is, the longer it takes to read. My one criticism is the repetitiveness of some sections, which is an artifact of their prior publication in shorter form elsewhere, but it does serve to drive home the seriousness of the discussion. Highly recommended.