There are few topics that are as rewarding of our time and patient exploration than the person and work of the Holy Spirit and that fact has been confirmed to me as I have been working through these chapters over the past few years. The project was initiated by the kind invitation of Moore Theological College in Sydney, Australia, to bring their annual lecture series. Hence, it is to the faculty and especially to my friend and Moore principal, Mark Thompson, that I dedicate this work. I am also grateful to Michael Allen for his valuable input and corrections. I am deeply appreciative of the collegiality, wisdom, and expertise of the Zondervan team, particularly Ryan Pazdur and Christopher Beetham. And I am especially grateful once again to my wife and children for their interest and comments on the work and for encouraging me in this project.