The work of Thomas Aquinas (1224-1275) has become increasingly influential in recent doctrinal theology and theological ethics, aside from his extraordinary historical significance. Thomas has been read ever since his death, today as much as ever. What is it that distinguishes his work, and can his theological judgments and proposals still be brought to bear in contemporary theological inquiry? This book presents a new study of Thomas Aquinas, focusing on the evangelical, pastoral and theocentric character of his premodern theology. Healy presents Thomas as first and foremost a theologian of the Christian life, who when he used philosophical concepts did so in order to fulfill the task of theology, which he conceived as an ecclesial discipline dedicated above all to helping Christians follow Jesus Christ. Thomas's interpretation of Scripture and his theological method, his Trinitarian ontology, his Christology and his Christological anthropology, conception of the church and sacramental theology, are all examined from this perspective. The richness and complexity yet profound simplicity of the Christian way of life Thomas reveals is shown to make a valuable contribution to the thought of contemporary readers, and the significance of Thomas's writings for contemporary theological questions and concerns is revealed.