"Living by faith" is much more than a general Christian precept; it is the fundamental posture of believers in a world rife with suffering and injustice. In this penetrating reflection on the meaning of "justification," Oswald Bayer shows how this key religious term provides a comprehensive horizon for discussing every aspect of Christian theology, from creation to the end times. Inspired by and interacting with Martin Luther, the great Christian thinker who grappled most intensely with the concept of justification, Bayer explores anew the full range of traditional dogmatics (sin, redemption, eschatology, and others), placing otherwise complex theological terms squarely within their proper milieu -- everyday life. In the course of his discussion, Bayer touches on such deep questions as the hidden nature of God, the hope for universal justice, the problem of evil, and -- one of the book's most engaging motifs -- Job's daring lawsuit with God.