![What is ‘papal infallibility?’ CNA explains an often-misunderstood Church teaching #Catholic
When Pope Pius IX declared the doctrine of the Immaculate Conception of the Virgin Mary on Dec. 8, 1854, he had a golden crown added to the mosaic of Mary, Virgin Immaculate, in the Chapel of the Choir in St. Peter’s Basilica. / Credit: Daniel Ibañez/CNA
CNA Staff, Dec 8, 2025 / 06:00 am (CNA).
On Dec. 8 the Catholic Church celebrates the solemnity of the Immaculate Conception — a paramount feast in the Church’s liturgical calendar and one that indirectly touches on a regularly misunderstood but important piece of Church dogma.The solemnity is the patronal feast of the United States and marks the recognition of the Blessed Mother’s freedom from original sin, which the Church teaches she was granted from the moment of conception.The Catechism of the Catholic Church states that Mary was “redeemed from the moment of her conception” (No. 491) in order “to be able to give the free assent of her faith to the announcement of her vocation” (No. 490). The dogma was disputed and challenged by Protestants over the centuries, leading Pope Pius IX to affirm it in his 1854 encyclical Ineffabilis Deus, stating unequivocally that Mary “was endowed with the grace of the Holy Spirit and preserved from original sin” upon her conception. Ineffabilis Deus is among the papal pronouncements that theologians have long considered to be “infallible.” But what does papal infallibility mean in the context and history of the Church?Defined by First Vatican Council in 1870Though Church historians argue that numerous papal statements down through the centuries can potentially be regarded as infallible under this teaching, the concept itself was not fully defined by the Church until the mid-19th century.In its first dogmatic constitution on the Church of Christ, Pastor Aeternus, the First Vatican Council held that the pope, when speaking “in the exercise of his office as shepherd and teacher of all Christians, in virtue of his supreme apostolic authority,” and while defining “a doctrine concerning faith or morals to be held by the whole Church,” possesses the infallibility that Jesus “willed his Church to enjoy in defining doctrine concerning faith or morals.”Father Patrick Flanagan, an associate professor of theology at St. John’s University, told CNA that the doctrine of papal infallibility “does not concern the pope’s character.”“The pope is human,” Flanagan said. “In other words, he is fallible. He can sin and err in what he says about everyday matters.”Yet in “rare historical, narrowly defined moments” when the pope “exercises his authority as the supreme teacher of the Church of the Petrine office” and speaks “ex cathedra,” he is guided by the Holy Spirit to speak “indisputable truth” about faith and morals, Flanagan said. Flanagan underscored the four specific criteria that a papal statement must make to be considered infallible. For one, the pope must speak “in his official capacity as supreme pontiff,” not off-the-cuff or informally. The doctrine, meanwhile, must concern a matter of faith or morals. “No pope would speak ex cathedra on scientific, economic, or other nonreligious subjects,” Flanagan said. The statement must also be “explicitly straightforward and definitive,” he said, and it “must be intended to bind the whole Church as a matter of divine and Roman Catholic faith.” John P. Joy, a professor of theology and the dean of faculty at St. Ambrose Academy in Madison, Wisconsin, told CNA that the doctrine can be identified in part by the reading of Matthew 16:19.In that passage, Christ tells Peter, the first pope: “I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.”“Part of what Jesus is promising here is that he will endorse and ratify in heaven all of the judgments that Peter makes on earth,” Joy said. “So when Peter (or one of his successors) turns the key, so to speak, that is, when he explicitly declares that all Catholics are bound to believe something on earth, then we have the words of Jesus assuring us that God himself will hold us bound to believe the same thing in heaven,” he said. Though the concept of papal infallibility is well known and has become something of a pop culture reference, the number of times a pope has declared something infallibly appears to be relatively small. Theologians and historians do not always agree on what papal statements through the centuries can be deemed infallible. Joy pointed to the Immaculate Conception, as well as Pope Pius XII’s declaration on the Assumption of the Blessed Virgin in 1950, as two of the most well known.He pointed to numerous other statements, such as Pope Benedict XII’s Benedictus Deus from 1336 and Pope Leo X’s Exsurge Domine in 1520, as infallible statements. Flanagan pointed out that there is “no official list” of papally infallible statements. Such declarations are “rare,” he said. “A pope invokes his extraordinary magisterial powers sparingly.” When Catholics trust a papally infallible statement, Joy stressed, they “are not putting [their] faith in the pope as if he were an oracle of truth or a source of divine revelation.” “We are rather putting our faith in God, whom we firmly believe will intervene in order to stop any pope who might be tempted to proclaim a false doctrine in a definitive way,” he said.](http://unitedyam.com/wp-content/uploads/2025/12/what-is-papal-infallibility-cna-explains-an-often-misunderstood-church-teaching-catholic-when-pope-pius-ix-declared-the-doctrine-of-the-immaculate-conception-of-the-virgin-mary.webp)

When Pope Pius IX declared the doctrine of the Immaculate Conception of the Virgin Mary on Dec. 8, 1854, he had a golden crown added to the mosaic of Mary, Virgin Immaculate, in the Chapel of the Choir in St. Peter’s Basilica. / Credit: Daniel Ibañez/CNA
CNA Staff, Dec 8, 2025 / 06:00 am (CNA).
On Dec. 8 the Catholic Church celebrates the solemnity of the Immaculate Conception — a paramount feast in the Church’s liturgical calendar and one that indirectly touches on a regularly misunderstood but important piece of Church dogma.
The solemnity is the patronal feast of the United States and marks the recognition of the Blessed Mother’s freedom from original sin, which the Church teaches she was granted from the moment of conception.
The Catechism of the Catholic Church states that Mary was “redeemed from the moment of her conception” (No. 491) in order “to be able to give the free assent of her faith to the announcement of her vocation” (No. 490).
The dogma was disputed and challenged by Protestants over the centuries, leading Pope Pius IX to affirm it in his 1854 encyclical Ineffabilis Deus, stating unequivocally that Mary “was endowed with the grace of the Holy Spirit and preserved from original sin” upon her conception.
Ineffabilis Deus is among the papal pronouncements that theologians have long considered to be “infallible.” But what does papal infallibility mean in the context and history of the Church?
Defined by First Vatican Council in 1870
Though Church historians argue that numerous papal statements down through the centuries can potentially be regarded as infallible under this teaching, the concept itself was not fully defined by the Church until the mid-19th century.
In its first dogmatic constitution on the Church of Christ, Pastor Aeternus, the First Vatican Council held that the pope, when speaking “in the exercise of his office as shepherd and teacher of all Christians, in virtue of his supreme apostolic authority,” and while defining “a doctrine concerning faith or morals to be held by the whole Church,” possesses the infallibility that Jesus “willed his Church to enjoy in defining doctrine concerning faith or morals.”
Father Patrick Flanagan, an associate professor of theology at St. John’s University, told CNA that the doctrine of papal infallibility “does not concern the pope’s character.”
“The pope is human,” Flanagan said. “In other words, he is fallible. He can sin and err in what he says about everyday matters.”
Yet in “rare historical, narrowly defined moments” when the pope “exercises his authority as the supreme teacher of the Church of the Petrine office” and speaks “ex cathedra,” he is guided by the Holy Spirit to speak “indisputable truth” about faith and morals, Flanagan said.
Flanagan underscored the four specific criteria that a papal statement must make to be considered infallible. For one, the pope must speak “in his official capacity as supreme pontiff,” not off-the-cuff or informally.
The doctrine, meanwhile, must concern a matter of faith or morals. “No pope would speak ex cathedra on scientific, economic, or other nonreligious subjects,” Flanagan said.
The statement must also be “explicitly straightforward and definitive,” he said, and it “must be intended to bind the whole Church as a matter of divine and Roman Catholic faith.”
John P. Joy, a professor of theology and the dean of faculty at St. Ambrose Academy in Madison, Wisconsin, told CNA that the doctrine can be identified in part by the reading of Matthew 16:19.
In that passage, Christ tells Peter, the first pope: “I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.”
“Part of what Jesus is promising here is that he will endorse and ratify in heaven all of the judgments that Peter makes on earth,” Joy said.
“So when Peter (or one of his successors) turns the key, so to speak, that is, when he explicitly declares that all Catholics are bound to believe something on earth, then we have the words of Jesus assuring us that God himself will hold us bound to believe the same thing in heaven,” he said.
Though the concept of papal infallibility is well known and has become something of a pop culture reference, the number of times a pope has declared something infallibly appears to be relatively small.
Theologians and historians do not always agree on what papal statements through the centuries can be deemed infallible. Joy pointed to the Immaculate Conception, as well as Pope Pius XII’s declaration on the Assumption of the Blessed Virgin in 1950, as two of the most well known.
He pointed to numerous other statements, such as Pope Benedict XII’s Benedictus Deus from 1336 and Pope Leo X’s Exsurge Domine in 1520, as infallible statements.
Flanagan pointed out that there is “no official list” of papally infallible statements. Such declarations are “rare,” he said. “A pope invokes his extraordinary magisterial powers sparingly.”
When Catholics trust a papally infallible statement, Joy stressed, they “are not putting [their] faith in the pope as if he were an oracle of truth or a source of divine revelation.”
“We are rather putting our faith in God, whom we firmly believe will intervene in order to stop any pope who might be tempted to proclaim a false doctrine in a definitive way,” he said.
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![16,000 teens attend Mass together to conclude NCYC #Catholic
Priests process into Lucas Oil Stadium on Nov. 22, 2025, for the concluding Mass in Lucas Oil Stadium at the National Catholic Youth Conference in Indianapolis. / Credit: Tessa Gervasini/CNA
Indianapolis, Indiana, Nov 24, 2025 / 10:35 am (CNA).
The 2025 National Catholic Youth Conferences (NCYC) concluded with a nighttime Mass drawing around 16,000 teenagers.After three days of prayer, community, sacraments, and a conversation with Pope Leo XIV, young Catholics packed into Lucas Oil Stadium in Indianapolis to end the conference with Mass on Nov. 22. Archbishop Nelson Pérez told CNA it was “beautiful” to celebrate the Mass alongside 25 of his brother bishops and more than 240 priests. “It’s the Church in its splendor,” Pérez said. “Tonight, we experienced the Church in its splendor.” The final Mass was celebrated on the Saturday before the solemnity of Christ the King. In his homily, Pérez said: “When I think about a king, I think about palaces and big thrones and power and authority.”“But when Jesus talks about king it’s … different,” Pérez said. “His throne is a cross. His crown is not made of gold and gems. It’s made of thorns. He doesn’t wear fancy, beautiful, priceless rings on his hands. He has nails.”The “very mystery of the life and the death of Christ, the King, and all of our lives is actually a dying and a rising — dying to sin, dying to the parts of our humanity that might be warped and wounded, and rising to new life to renewal of our soul.”Then “that process goes over and over over and over and over again until we die in Christ for the last time and then rise with him,” Pérez said. “How blessed, how filled with hope we are.”Pérez reminds teens: ‘Christ loves you just as you are’Pérez concluded his homily by tying his message back to what Pope Leo told the teens in his digital encounter with them on Nov. 21. Pérez told the teenagers Pope Leo spoke with them because he loves them.Pope Leo has “gathered with youth all over the place, especially this summer, [during] the Jubilee of Youth,” Pérez said. The pope’s “message is profound, powerful, and simple at the same time: ‘Christ loves you just as you are.’”Pérez reminded the crowd to listen to what the pope said to them. “Think of your closest friends. If they were hurting, you would walk with them, listen, and stay close,” the pope said. “Our relation with Jesus is similar. He knows when life feels heavy, even when we do not feel his presence, our faith tells us he is there.”“To entrust our struggles to Jesus, we have to spend time in prayer … We can speak honestly about what’s in our hearts,” Pérez said, quoting the pope. “That is why daily moments of silence are so important, whether through adoration, reading Scripture, or simply talking to him.”“‘Little by little, we learn to hear his voice, both from within and through the people he sends us. As you grow closer to Jesus,’ he said to us, ‘Do not fear what he may ask of you. If he challenges you to make changes in your life, it’s always because he wants to give you greater joy and freedom. God is never outdone in generosity.’”“The pope’s digital visit was what made this NCYC epic, really epic and different from any other,” Pérez told CNA. The success was from “the excitement of our youth to welcome the Holy Father” and Pope Leo’s “generosity and willingness” to speak with them. Being a part of the conference and seeing so many young Catholics at Mass together made Pérez feel “hopeful,” he said. “In a world and a country that’s so divided right now and violent at times, after this, I’m just so full of hope. It’s almost like we’re going to be OK.”“It’s incredible to see the young Church alive,” Pérez said. “It’s such a beautiful, beautiful gathering.”](http://unitedyam.com/wp-content/uploads/2025/11/16000-teens-attend-mass-together-to-conclude-ncyc-catholic-priests-process-into-lucas-oil-stadium-on-nov-22-2025-for-the-concluding-mass-in-lucas-oil-stadium-at-the-national-catholic-youth-co.webp)









![Bishops discuss faith formation before National Catholic Youth Conference #Catholic
Organizers of Pope Leo XIV’s upcoming digital dialogue with young people Nov. 21 at the National Catholic Youth Conference in Indianapolis speak to the media at the site of the United States Catholic Bishops’ Conference Fall Plenary Assembly in Baltimore on Nov. 12, 2025. Left to right: Cardinal Christophe Pierre, papal nuncio to the United States; Montse Alvarado, president and COO of EWTN News; Archbishop Nelson J. Pérez, Archdiocese of Philadelphia; Christina Lamas, executive director of National Federation for Catholic Youth Ministry; and Archbishop Charles Thompson, Archdiocese of Indianapolis. / Credit: Shannon Mullen/National Catholic Register
Baltimore, Maryland, Nov 17, 2025 / 07:00 am (CNA).
Bishops discussed young Catholics’ place in the Church ahead of the National Catholic Youth Conference.At the United States Conference of Catholic Bishops’ (USCCB) Fall Plenary Assembly in Baltimore, bishops spoke about the young generation as many prepare to attend NCYC. The conference will take place Nov. 20–22 in Indianapolis for prayer, community, evangelization, and service among Catholic teenagers.During NCYC, Pope Leo XIV will hold a digital dialogue with teens from across the nation. “When the pope speaks, he speaks to the world, and this will be a wonderful, wonderful moment. This encounter will engage young people in real time,” said Archbishop Nelson Pérez of Philadelphia. At a Nov. 12 press conference at the USCCB fall plenary, Pérez said “there is a deep significance to this encounter.” He added: “It reflects the Holy Father’s desire to connect with young people, with our youth, whom his predecessor … Pope Francis, called ‘the now of God.’”Pérez said during his time as a priest and bishop, he has noticed teenagers “want a place in the Church.” He said: “They want to be seen, heard, and valued, which is so beautiful ... They want to be loved by the Church.”“Even in today’s interconnected world, the Church can seem far away from young people. The Holy Father’s choice to encounter the American youth ... is an expression of his closeness to the youth of the world.”“This moment will mark a powerful opportunity for young people to witness the beauty of the universal Church with our Holy Father and to express their concerns, voices, experience, [and] what’s in their hearts,” Pérez said.Bishop Joseph Espaillat, auxiliary bishop for the Archdiocese of New York, has attended NCYC more than a dozen times. He told CNA “the energy and the vibrancy of the young people” is why he returns each year.“It’s not just the local parish or the local diocese, but it’s the national Church and there’s something powerful when we come together,” Espaillat said.This year’s event is “the first time ever the Holy Father has a live online interview like this,” at NCYC, Espaillat said. “What I love about it is that the Church in the United States is leading right now. The young people being the focus with our Holy Father is going to be great, and it’s going to produce a lot of positive energy in our Church.”Espaillat encouraged attendees “to be open and allow yourself to be surprised by the Holy Spirit.” He added: “Don’t go in with a preconceived notion. It is a great event in which there are many, many fruits. I’ve seen young people just come to life at the event.”Youth draw closer to the ChurchAs thousands of teenagers plan to gather at the national conference, U.S. bishops further explained why so many young Catholics are looking to the Church. A number of bishops highlighted the Catholic presence on social media is helping to draw them in.Bishop William Byrne of Springfield, Massachusetts, told CNA the exponential growth of young Catholics coming to the Church is “amazing and exciting.” Byrne, who served as chair for the USCCB’s committee on communications, detailed how much its online presence has grown its outreach to the young generation and wider population. “Beginning with the illness of our beloved Pope Francis, through the funeral, and then the transition to Pope Leo, we’ve actually had a 226% growth in our social media on the four platforms we use — TikTok, Instagram, X, and YouTube,” he said.“The amazing thing is, it’s still growing. It means that people are seeing it, sharing it,” Byrne said. He specifically noted it’s the “young people” spreading the message online. “So we see that we are reaching people,” Byrne said. “But our goal is not to get people locked on their phones. Our goal is to get people locked on Jesus Christ and have the impression be Jesus Christ and his bride, the Church.”“This is an exciting time. It’s not without its challenges, but it’s also a wonderful opportunity,” Byrne said. “We’re reaching young people who are curious and hungry. It’s so exciting to see the Church continue to speak to the world, because the Church has never lost her relevance.”The start of the Catholic online presence followed the movement of the new atheists, Bishop Robert Barron of Winona-Rochester, Minnesota, said. He told CNA the movement was made up of “people who were really shaping the culture, saying: ‘There’s no purpose of life. We come from nowhere. We go nowhere. There’s no objective moral value.’”“A lot of people, myself included, began to get on social media with a religious voice,” Barron said. “People who had not heard a religious voice or who were disaffiliated … could find people like me and many others who were actually talking about God and about religion.”“But I think as a whole generation came of age, they realized what a desperately sad and empty message that is,” Barron said. “There’s this hunger in the heart for God, and so that just reasserts itself. I think a lot of younger people who were raised on this very vapid philosophy began to look to religion.”As more young Catholics get involved in youth formation whether in their parishes or at larger gatherings like NCYC, Barron said he encourages them to use the opportunities to “build community and build a sense of family with other believers.”Barron, who is the founder of the Catholic media organization Word on Fire, has gained nearly 3 million YouTube subscribers and millions of other followers across social media platforms. But, he said, “one drawback of social media is that it’s a little private world. It can be a lot of people accessing it, but privately.”“Maybe through social media an individual finds a path to religion, but then to look around a room and see thousands of other people that are on a similar path — that’s a great thing,” Barron said.](http://unitedyam.com/wp-content/uploads/2025/11/bishops-discuss-faith-formation-before-national-catholic-youth-conference-catholic-organizers-of-pope-leo-xivs-upcoming-digital-dialogue-with-young-people-nov-21-at-the-national-catholi.webp)


