St. Augustine is among the most important theologians in Christendom. His concept of the church as a spiritual world, distinct from the material world, exercised a profound influence on medieval philosophy, and his Confessions are among the world's most widely read autobiographies.

St. Augustine is among the most important theologians in Christendom. His concept of the church as a spiritual world, distinct from the material world, exercised a profound influence on medieval philosophy, and his Confessions are among the world's most widely read autobiographies.