The Church's traditional teaching on divine immutability is frequently criticized today by theologians belonging to a wide variety of nationalities and confessions. Such theologians are frequently united in singling out St. Thomas Aquinas as the best representative of the tradition that they are criticizing. Unfortunately, however, their criticism often involves a misrepresentation of St. Thomas' actual teaching on divine immutability. This book provides a clear, accurate, and detailed account of St. Thomas' teaching, presented in a way that allows St. Thomas to speak to the problems and issues that are raised in contemporary theology regarding divine immutability.