This accessible introduction explores the life, thought, and theological method of Bernard Lonergan, S.J. It traces his biography, intellectual influences, and major works-especially Insight and Method in Theology. Cush explains Lonergan's functional specialties, conversion theory, and impact on Catholic theology. Designed for students and newcomers, the book offers a clear roadmap to Lonergan's approach, underscoring its value for contemporary theological reflection and pastoral practice.