Augustine of Hippo is a giant in the history of Christian thinking. Commended by St. Jerome for having virtually "refounded the old faith", he was a philosopher, theologian, preacher, interpreter of scripture, monk and bishop. Augustine dominated the minds of medieval theologians, had an enormous effect on the leaders of the Reformation, and continues to influence Christian thought today.Mary Clark provides a clear and rounded account of what Augustine taught and argued, from his rejection of Manicheism through his ideas on grace, salvation and the Trinity.