The Achievement of Bernard Lonergan by David Tracy is an in-depth analysis of Bernard Lonergan's philosophical works, particularly how Lonergan attempts to bridge traditional Catholic faith with modern thought through the method of discovery and historical awareness. Tracy highlights how Lonergan, through his work Insight, demonstrates the existence of a universal structure of inquiry in the human mind, linking science, philosophy, and theology, and how Lonergan later developed a Method in Theology to address the challenges of the modern age by distinguishing between classical and historical man in questioning and understanding.