In the mid-1260s in Paris, a dispute raged that concerned the relationship between faith and the Augustinian theological tradition on the one side and secular leaning as represented by the arrival in Latin of Aristotle and various Islamic and Jewish interpreters of Aristotle on the other. Masters of the arts faculty in Paris represented the latter tradition, indicated by the phrase ""double truth theory."" The introduction places the work historically and sketches the controversy to which it was a contribution. Part 2 includes the Latin Leonine text and McInerny's translation. Part 3 analyzes the basic arguments of Thomas's work and provides a series of interpretive essays meant to make Thomas accessible to today's readers.