The Pope, who has full authority to govern and teach the Church, is the head of all the bishops. All the bishops are united to this head so that the Pope's authority is perfect and complete. This authority comes from Christ, the Head of the Church, because he established Simon as the rock and holder of the keys of the Church, appointing him as the Shepherd of the flock... Catechesis on the Second Vatican Council, structure, with Fr Justolat Rafaralahimboa.