The Catholic Church is infallible in her official teaching on faith and morals. But she does not claim to be infallible in making people live up to those teachings. Her infallibility does not deprive her subjects of their freewill. After all, you yourself would admit that God is infallible, yet you would not account for people who violate the commandments by denying God’s infallibility. You would account for it by the evil dispositions of the people concerned. And as the infallibility of God does not take away freewill from men, neither does the infallibility of the Catholic Church take it away from her subjects.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty