The First Vatican Council pronounced that the pope, in or out of council, would be protected by God with the gift of infallibility whenever he should define a doctrine pertaining to faith or morals. Matters of Faith can only involve religious propositions and the matter of those propositions are true or false judgments. A moral definition would involve a proposition that is right or wrong, rather than true or false. The difference between the two involves the end being sought. A doctrinal pro...
