This book proposes that each and every valid Roman Pontiff is preserved by the grace of God from certain errors and certain sins for the sake of the indefectibility of the Church and the salvation of souls. The Roman Pontiff is the Rock on which the Church is founded, not only by his office, but also in his person. Therefore, both the office and the person are protected from error and sin, from evil and corruption.What is the extent and limit of the...