Preachers mount the pulpit steps terribly burdened by the conviction that they are somehow responsible for the growth and spiritual well-being of their congregants. How, they ask themselves, can mere words communicate the reality of God, bring life to a congregation, or foster spiritual growth?

This study argues that effective sermons function much like Jesus parables--by bearing witness to divine power. Parables and preaching both testify to something beyond themselves: to a life-giving dynamic that far outstrips the force of words alone. Preachers are not go-betweens or gatekeepers for the...