The Book of Revelation depicts Jesus as a lion who has conquered (Rev. 5:5). But what has Jesus conquered? And how has he done so? The Bible also repeatedly refers to Jesus as our "savior." But what does Jesus save us from, and how does he do so? This book is a scholarly introduction to Catholic soteriology-the branch of theology that seeks to answer these questions-as expressed in Scripture and Tradition. It guides the reader through the fundamental principles, issues, and questions, such as the nature of and relationship between sin, death, hell, the devil, and punishment; the purpose of ritual and moral sacrifices in the Old Testament; the salvific function of the Incarnation, public ministry, and Paschal Mystery of Christ; the objective work of Christ and our subjective participation in that work; cooperation between grace and good works; the salvific function of Baptism, Penance, and the Eucharist; and the relation between the sacrifice of the Cross and the sacrifice of the Mass.