Papal infallibility is a dogma of the Catholic Church which states that, in virtue of the promise of Jesus to Peter, the pope when he speaks is preserved from the possibility of error on doctrine "initially given to the apostolic Church and handed down in Scripture and tradition". It does not mean that the pope cannot sin or otherwise err. This doctrine, defined dogmatically at the First Vatican Council of 1869–1870 in the document , is claimed to have existed in medieval theology and to have been the majority opinion at the time of the Counter-Reformation.

The doctrine of infallibility relies on one of the cornerstones of Catholic dogma, that of papal supremacy, whereby the authority of the pope is the ruling agent as to what are accepted as formal beliefs in the Catholic Church. [First published 1986–1998 by Brill as Evangelisches Kirchenlexikon (3rd ed.), in German.] The use of this power is referred to as speaking . "Any doctrine 'of faith or morals' issued by the pope in his capacity as successor to St. Peter, speaking as pastor and teacher of the Church Universal [], from the seat of his episcopal authority in Rome, and meant to be believed 'by the universal church', has the special status of an statement. The First Vatican Council in 1870 declared that any such doctrines have the character of infallibility (session 4, Constitution on the Church 4)."

Doctrine

Nature of infallibility The Church teaches that infallibility is a charism entrusted by Christ to the whole Church, whereby the Pope, as head of the College of Bishops, enjoys papal infallibility. This charism is the supreme degree of participating in Christ's divine authority, which, in the New Covenant, so as to safeguard the faithful from defection and guarantee the profession of faith, ensures the faithful abide in the truth. The Church further teaches that divine assistance is also given to the pope when he exercises his ordinary Magisterium.

Conditions for teachings being declared infallible According to the teaching of the First Vatican Council and Catholic tradition, the conditions required for papal teaching are as follows:

the Roman pontiff (the pope alone or with the College of Bishops) speaks that is, when (in the discharge of his office as shepherd and teacher of all Christians, and by virtue of his supreme apostolic authority) he defines a doctrine: concerning faith or morals, and to be held by the whole Church.

The terminology of a definitive decree usually makes clear that this last condition is fulfilled, as through a formula such as "By the authority of Our Lord Jesus Christ and of the Blessed Apostles Peter and Paul, and by Our own authority, We declare, pronounce and define the doctrine[...] to be revealed by God and as such to be firmly and immutably held by all the faithful," or through an accompanying anathema stating that anyone who deliberately dissents is outside the Catholic Church.

For example, in 1950, with , Pope Pius XII's infallible definition regarding the Assumption of Mary, there are attached these words:

As with all charisms, the Church teaches that the charism of papal infallibility must be properly discerned, though only by the Church's leaders.Congregation for the Doctrine of the Faith's Letter "Iuvenescit Ecclesia", 9 Finally, conciliar teaching constantly recognizes the essential role of pastors in the discernment of the charisms and their ordered exercise within the ecclesial communion.[...] Footnote Cf. Second Vatican Ecumenical Council, Dogmatic Constitution Lumen Gentium, 12: "judgment as to their genuinity and proper use belongs to those who are appointed leaders in the Church, to whose special competence it belongs, not indeed to extinguish the Spirit, but to test all things and hold fast to that which is good (cf. 1 Ts 5:12 and 19–21)". Although this refers immediately to the discernment of extraordinary gifts, by analogy, what is stated here applies generically for every charism. The way to know if something a pope says is infallible or not is to discern if they are teachings. Also considered infallible are the teachings of the whole body of bishops of the Church, especially but not only in an ecumenical council (see Infallibility of the Church).

Limits does not allow any infallibility for the church or Pope for new doctrines. Any doctrines defined must be "conformable with Sacred Scripture and Apostolic Traditions":

It gives examples of the kinds of consultations that are appropriate: assembling Ecumenical Councils, asking for the mind of the Church scattered around the world, Synods, and so on.

Not all Catholic teaching is infallible. The Congregation for the Doctrine of the Faith differentiates three kinds of doctrine:

to be believed as to be held following a act by a pope or Ecumenical council following a by a Pope, confirming or re-affirming a thing taught by the teaching authority of bishops worldwide otherwise, to be respected or submitted to (in the case of priests and religious) as part of the teaching authority of bishops, but without any claim of infallibility.

Examples of doctrines to be believed as 'divinely revealed' include the sayings of Jesus in the Gospels, since the Gospels are part of the Bible, which is part of the deposit of divine revelation, as well as the Immaculate Conception of Mary and the Assumption of Mary, since the documents defining these doctrines state clearly that they are part of the divinely revealed truths. Examples of doctrines to be held 'definitively' include Transubstantiation, the Sacramental Seal, women not being allowed to be ordained as priests, and papal infallibility itself.

In July 2005 Pope Benedict XVI stated during an impromptu address to priests in Aosta that: "The Pope is not an oracle; he is infallible in very rare situations, as we know." Pope John XXIII once remarked: "I am only infallible if I speak infallibly but I shall never do that, so I am not infallible." A doctrine proposed by a pope as his own opinion, not solemnly proclaimed as a doctrine of the Church, may be rejected as false, even if it is on a matter of faith and morals, and even more any view he expresses on other matters. A well-known example of a personal opinion on a matter of faith and morals that was taught by a pope but rejected by the Church is the view that Pope John XXII expressed on when the dead can reach the Beatific Vision. The limitation on the pope's infallibility "on other matters" is frequently illustrated by Cardinal James Gibbons's recounting how the Pope Leo XIII mistakenly called him "Jibbons".Sources:

Background Ex cathedra

and are Latin words for 'chair', a symbol of the teacher in the ancient world. Thus is the position of a university professor referred to as a chair, and the position of a bishop as a see (from ). Believed by Catholics to be the successor of Peter, the pope is said to occupy the "Chair of Saint Peter" and his jurisdiction as the bishop of Rome is often referred to as the "Holy See". Because Catholics believe that their bishops are the successors of the apostles and that Peter had a special role among the apostles as the preserver of unity, the pope is considered the spokesman for the whole church.

The doctrine of papal infallibility, the Latin phrase (literally, 'from the chair'), was proclaimed by Pius IX in 1870 as meaning "when, in the exercise of his office as shepherd and teacher of all Christians, in virtue of his supreme apostolic authority, [the Bishop of Rome] defines a doctrine concerning faith or morals to be held by the whole Church."

The response demanded from believers has been characterized as 'assent' in the case of declarations of the popes and 'due respect' with regard to their other declarations.

Scripture and primacy of Peter On the basis of Mark 3:16, 9:2, Luke 24:34 and 1 Corinthians 15:5, the Catechism of the Catholic Church describes Peter as holding first place among the apostles. It speaks of Peter as the rock on which, because of Peter's faith, Christ said in Matthew 16:18 he would build his Church, which he declared would be victorious over the powers of death. In Luke 22:32, Jesus gave Peter the mission to keep his faith after every lapse and to strengthen his brothers in it. The Catechism of the Catholic Church sees the power of the keys that Jesus promised in Matthew 16:19 to be for Peter alone and as signifying authority to govern the house of God, that is, the Church, an authority that Jesus after his resurrection confirmed for Peter by instructing him in John 21:15–17 to feed Christ's sheep. The power to bind and loose, conferred on all the apostles jointly and to Peter in particular (Matthew 16:19), is seen in the Catechism of the Catholic Church as authority to absolve sins, to pronounce judgments on doctrine and to make decisions on church discipline.

Primacy of the Roman pontiff

Theological history

Brian Tierney has argued that the 13th-century Franciscan priest Peter Olivi was the first person to attribute infallibility to the pope. Tierney's idea was accepted by August Bernhard Hasler, and by Gregory Lee Jackson.Gregory Lee Jackson, Catholic, Lutheran, Protestant (Self-published 2007 ), p. 185 It was rejected by James Heft and by John V. Kruse.Kruse's conclusions on the basis of papal bulls of the time give uncertain results about the existence in them of the notion of papal infallibility (John V. Kruse (2005), "Reevaluating The Origins of Papal Infallibility", Saint Louis University, Abstract Klaus Schatz says Olivi by no means played the key role assigned to him by Tierney, who failed to acknowledge the work of earlier canonists and theologians, and that the crucial advance in the teaching came only in the 15th century, two centuries after Olivi; and he declares that "It is impossible to fix a single author or era as the starting point." Ulrich Horst criticized the Tierney view for the same reasons. In his Protestant evaluation of the ecumenical issue of papal infallibility, Mark E. Powell rejects Tierney's theory about 13th-century Olivi, saying that the doctrine of papal infallibility defined at the First Vatican Ecumenical Council had its origins in the 14th century – he refers in particular to Bishop Guido Terreni – and was itself part of a long development of papal claims.

Schatz points to "the special esteem given to the Roman church community [that] was always associated with fidelity in the faith and preservation of the paradosis (the faith as handed down)". Schatz differentiates between the later doctrine of "infallibility of the papal magisterium" and the Hormisdas formula in 519, which asserted that "The Roman church has never erred (and will never err)." He emphasizes that Hormisdas formula was not meant to apply so much to "individual dogmatic definitions but to the whole of the faith as handed down and the tradition of Peter preserved intact by the Roman Church". Specifically, Schatz argues that the Hormisdas formula does not exclude the possibility that individual popes become heretics because the formula refers "primarily to the Roman tradition as such and not exclusively to the person of the pope".

Ecumenical councils