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.