The purpose of all war is peace. peace
Custom is second nature. nature
Augustine of Hippo, also known as Saint Augustine or Saint Austin, was an early Christian theologian and philosopher whose writings influenced the development of Western Christianity and Western philosophy. He was the bishop of Hippo Regius, located in Numidia. He is viewed as one of the most important Church Fathers in the Western Christianity for his writings in the Patristic Era. Among his most important works are City of God and Confessions.
According to his contemporary, Jerome, Augustine "established anew the ancient Faith." In his early years, he was heavily influenced by Manichaeism and afterward by the Neo-Platonism of Plotinus. After his baptism and conversion to Christianity in 387, Augustine developed his own approach to philosophy and theology, accommodating a variety of methods and perspectives. Believing that the grace of Christ was indispensable to human freedom, he helped formulate the doctrine of original sin and made seminal contributions to the development of just war theory.
When the Western Roman Empire began to disintegrate, Augustine developed the concept of the Catholic Church as a spiritual City of God, distinct from the material Earthly City.