St. Augustine

'De Doctrina Christiana', also known as 'On Christian Doctrine', is a theological treatise by St. Augustine of Hippo. Written in four books, it serves as a guide for interpreting and understanding the Scriptures. Augustine outlines principles of biblical hermeneutics, discussing the importance of knowing both the literal and figurative senses of the text. He emphasizes the role of rhetoric in effectively communicating Christian teachings. The work also explores the relationship between earthly and divine knowledge, advocating for the use of classical learning in the service of Christian truth. 'De Doctrina Christiana' remains a foundational text for Christian educators and theologians.

Written between 413-426 CE, 'The City of God' is a response to pagan claims that the sack of Rome by barbarians was a consequence of the abolition of pagan worship by Christian emperors. Augustine argues that Christianity saved the city from complete destruction and that Rome’s fall was due to internal moral decay. The book divides humanity into two metaphorical cities: the City of God, characterized by devotion to God, and the City of Man, characterized by self-love. It also outlines Augustine’s theological interpretation of human history, from the Creation to the Second Coming of Christ, and critiques paganism and pagan philosophy while presenting the true history of the City of God.

Written in Latin between AD 397 and 400, 'Confessions' is a blend of autobiography, philosophy, theology, and critical exegesis of the Christian Bible. The first nine books are autobiographical, tracing Augustine's life from his birth to his conversion to Catholicism. He recounts his sinful youth, his involvement with Manicheism and Neoplatonism, and his eventual conversion in a Milanese garden. The last four books focus on philosophical and theological issues, including memory, time, eternity, and the interpretation of the Book of Genesis. The work is structured as a series of prayers to God, reflecting Augustine's journey of redemption and his understanding of God's grace and providence.