It is difficult to overestimate the impact that Pope Benedict XVI has had on the Catholic Church. He served the people of God as a priest, an advisor at the Second Vatican Council, a bishop, a cardinal, Prefect of the Congregation for the Doctrine of the Faith, and the 265th pope. But in addition to his influence as a churchman, Joseph Ratzinger also stands out as one of the most significant thinkers in recent history. He is the author of more than sixty books, numerous articles, and countless homilies. Catholics and non-Catholics alike have been inspired and challenged by his theological writings.