Are Christians merely forgiven, or does God credit them with righteousness of Christ? This is a central question in contemporary challenges to the historic Protestant understanding of justification by faith. In response, John Piper offers a lucid and compelling examination of the doctrine of Christ's righteousness and its role in the justification of sinners. He combines careful exegesis of biblical texts with a pastor's heart for the welfare of the church, to show that we need to see ourselves as the recipients of the imputation of Christ's righteousness. This is the basis of our full acceptance with God and everlasting inheritance of life and joy.