The Catholic Church’s teaching on papal infallibility is one which is generally misunderstood by those outside the Church. In particular, Fundamentalists and other "Bible Christians" often confuse the charism [gift] of papal "infallibility" with "impeccability." They imagine Catholics believe the pope cannot sin. Others, who avoid this elementary blunder, think the pope relies on some sort of amulet or magical incantation when an infallible definition is due.
Given these common misapprehensions regarding the basic tenets of papal infallibility, it is necessary to explain exactly what infallibility is not. Infallibility is not the absence of sin. Nor is it a charism that belongs only to the pope. Indeed, infallibility also belongs to the body of bishops as a whole, when, in doctrinal unity with the pope, they solemnly teach a doctrine as true. We have this from Jesus himself, who promised the apostles and their successors the bishops, the magisterium of the Church: "He who hears you hears me" (Luke 10:16), and "Whatever you bind on earth shall be bound in heaven" (Matt. 18:18)...
Since Christ said the gates of hell would not prevail against his Church (Matt. 16:18b), this means that his Church can never pass out of existence. But if the Church ever apostasized by teaching heresy, then it would cease to exist; because it would cease to be Jesus’ Church. Thus the Church cannot teach heresy, meaning that anything it solemnly defines for the faithful to believe is true. This same reality is reflected in the Apostle Paul’s statement that the Church is "the pillar and foundation of the truth" (1 Tim. 3:15). If the Church is the foundation of religious truth in this world, then it is God’s own spokesman. As Christ told his disciples: "He who hears you hears me, and he who rejects you rejects me, and he who rejects me rejects him who sent me" (Luke 10:16).
