What happens in the heart when it experiences real saving faith? John Piper argues that faith in Christ is not saving unless it includes an "affectional dimension of treasuring Christ." Nor is God glorified as he ought to be unless he is treasured in being trusted. Saving faith in Jesus Christ welcomes him forever as our supreme and inexhaustible pleasure. What Is Saving Faith? explains that a Savior who is treasured for his all-satisfying worth is more glorified than a Savior who is only trusted for his all-forgiving competence. In this way, saving faith reaches its God-appointed goal: the perfections of Christ glorified by our being satisfied in him forever.

John Piper is founder and lead teacher of desiringGod.org and chancellor of Bethlehem College& Seminary. He served for thirty-three years as a pastor at Bethlehem Baptist Church in Minneapolis, Minnesota, and is the author of more than fifty books, including Desiring God; Don't Waste Your Life; and Providence.