The mission of the Magisterium is linked to the definitive nature of the covenant established by God with his people in Christ. It is this Magisterium's task to preserve God's people from deviations and defections and to guarantee them the objective possibility of professing the true faith without error. . . To fulfill this service, Christ endowed the Church's shepherds with the charism of infallibility in matters of faith and morals. 2 Often those who object to the doctrine of infallibility confuse it with impeccability or personal inerrancy . It is neither.
Impeccability means that a person is incapable of sinning.
Popes, like other Christians, are sinners. Personal inerrancy means that Popes cannot make mistakes. Infallibility , on the other hand, refers on to that guidance of the Holy Spirit that guards Popes from officially teaching error in matters of faith and morals. The foundational elements of the doctrine embody the following points. First, Jesus established Peter in a dynastic office as head of the apostles and empowered him with his authority in deciding matters of faith and morals.