The Christian Church has no shortage of revered figures and saints, but it is difficult to find one that had a more decisive impact on the course of the Church's history than Augustine of Hippo. Augustine was a bishop of Hippo Regius in Africa, but his works, sermons and writings helped hold the Church together even as the Western Roman Empire was in its death throes, to the extent that every major branch of Christianity recognizes him today. The Catholic Church has venerated him as a saint and a Doctor of the Church, Orthodox Christians also consider him a saint, and Protestants and Calvinists cite him as one of the fathers and inspirations of the Protestant Reformation. In many respects, Augustine has provided the theological bedrock for Christians for nearly 1600 years, and as theologian John Leith noted in 1990, "Augustine, the North African of Berber descent, is today the spiritual father of multitudes who are remote indeed from him racially, politically, and culturally." On Rebuke and Grace sets forth what is the Catholic faith concerning law, concerning free will, and concerning grace. He teaches that the grace of God by Jesus Christ is that by which alone men are delivered from evil, and without which they do absolutely no good; and this not only by the fact that it points out what is to be done, but that it also supplies the means of doing it with love, since God bestows on men the inspiration of a good will and deed. He teaches that the rebuke of evil men who have not received this grace is neither unjust-since they are evil by their own will-nor useless, although it must be confessed that it is only by God's agency that it can avail.