This book is a real masterpiece that belongs to the pen of Saint Thomas Aquinas (1225–1274). It contains the most prominent thoughts on the topical of theology of that time. The author does a fantastic job in describing the western theology in terms of Christianity which is based on the Roman Catholic church. Summa Theologica, Part I-II covers such topics as God and its relationship with Man, the purpose of Man, God's creation, Christ. Saint Thomas Aquinas introduces in this book his five famous arguments supporting the existence of God. Summa Theologica quotes the books of Augustine of Hippo, Aristotle, and other scholars.