Fulton J. Sheen's The Moral Universe: A Preface to Christian Living is an exposition of Christian ethics and a practical guide to living a moral and meaningful life. Sheen argues that the universe is governed by divine moral laws, not created by humans, and that obedience to these laws is essential for righteous living. Sheen addresses the common argument that evil exists in the world if God is good, and counters it by arguing that God created a moral universe by giving humans freedom. Evil arises from the misuse of this freedom. When freedom is used properly, in accordance with Christian teaching, true happiness can be found. The book's main points are: The Role of Conscience, The Nature of Sin and Redemption, The Christian Life, The Divine Foundations of Morality, and The Reality of the Afterlife. Overall, 'The Moral Universe' is an inspiring book and serves as a guide to understanding Catholic ethics and applying Christian principles to everyday life.