This dissertation examines the preaching ministry of John Newton as a model of biblical exposition that was guided by a gospel-centric, pastoral homiletic. Chapter 1 defines the thesis of this dissertation , introduces the subject of this dissertation by surveying the scholarly work that has concentrated on Newton’s life and ministry, and demonstrates the lack of focused study on Newton’s preaching. Chapter 2 is a biographical survey of Newton’s life and ministry. Chapter 3 serves as an introduction to Newton’s preaching by surveying Newton’s sermons and demonstrates that Newton’s preaching should be regarded as expository. Attention is also given to the eighteenth-century historical context in which Newton preached. Chapter 4 argues that Newton’s high view of Scripture served as a foundation of his ministry and preaching. Chapter 5 is a discussion of Newton’s Christ-centered piety with regard to its impact on his life, ministry and preaching. Chapter 6 maintains that Newton’s Christ-centered spirituality is evident in his gospel-centric preaching and the homiletical methods that guided him. Chapter 7 examines Newton’s preaching and his commitment to pastoral ministry. It argues that Newton’s preaching rhetoric was a function of a pastoral homiletic that was deeply concerned with the spiritual welfare of his hearers. The final chapter summarizes the major points of dissertation and reflects on the importance of the use of historical models like Newton for contemporary preaching.