City of God (De Civitate Dei)

"City of God" (De Civitate Dei), written by Saint Augustine in the early 5th century, is a philosophical and theological work that contrasts two "cities": the earthly city, characterized by self-love and material pursuits, and the heavenly city, founded on love for God and spiritual virtues. Augustine argues that history unfolds through these two communities, with the ultimate goal of guiding individuals toward divine eternal life. The book addresses issues like the fall of Rome, the nature of divine justice, and the relationship between spiritual and worldly realities, emphasizing that true peace and fulfillment come from devotion to God.