This text is an exposition of the theological method practiced by Bernard Lonergan from 1940-1984. The author traces the course of what surely was the most significant series of questions in Lonergan's methodological developments between Insight and Method in Theology. Includes the contents of unpublished and/or Latin works that would not be studied by many otherwise, and offers the only extensive study of this series of important developments. The topic is of enormous importance for understanding one of the major theologians of our century. Contents: The Preliminary Context for Lonergan's Ordering of Ideas; Recovering the Mind of Aquinas; A Thematic Statement of the Via Inventionis and the Via Doctrinae; Three Processes in Speculative Theology: Analysis, Synthesis, and the Historical Evolution of Understanding; Problems Deriving From the Evolution of Theological Understanding; The Concern for the Place of History in Theological Development and the Turn to Subject in "De Methodo Theologiae"; The 1964 Revision of the De Deo Trino: Pars Analytica That Becomes the De Deo Trino I: Pars Dogmatica; The 1964 Revision of the Introduction to the 1957 Divinarum Personarum Conceptio Analogica; A Critical Review of The Evolution of the Twofold Process.