
Catholicism and Christianity are often regarded as two distinct religions, with some arguing that Catholicism is a denomination of Christianity. The Catholic Church, the Protestant Church, and the Eastern Orthodox Church are the three largest Christian denominations. The Catholic Church, which has a long history dating back to the beginning of Christianity, claims to be the one true form of Christianity, with all other Christian denominations having schismed from it. However, some argue that the Catholic Church is just another denomination within Christianity, and that the true church is one that follows the Bible and the teachings of Jesus Christ. The debate surrounding whether Catholicism is a denomination of Christianity or a separate religion is complex and multifaceted, with valid arguments on both sides.
| Characteristics | Values |
|---|---|
| Catholics consider themselves the original form of Christianity | Catholicism is the original form of Christianity |
| Catholics believe other denominations are heretics | Baptist, Lutheran, Orthodox, Anglican, and Protestant denominations are heretics |
| Catholics believe in confessing sins to a priest | Catholics confess their sins to a priest |
| Catholics believe in the worship of Mary | Catholics worship Mary |
| Catholics believe in the doctrine of apostolic succession | Catholics believe in apostolic succession |
| Catholics do not allow divorce | Catholics do not divorce |
| Catholics drink alcohol | Catholics drink alcohol within reason |
| Catholics are similar to Protestants | Catholicism and Protestantism compose Western Christianity |
| Catholics are the second-largest Christian denomination | Eastern Orthodox Church is the second-largest Christian body |
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What You'll Learn
- Catholic Church: direct continuation of the church founded by Jesus Christ
- Catholic doctrine: salvation through sacramental confession and penance
- Catholic vs. Protestant: the Reformation and violation of the Bible
- Catholic vs. Orthodox: the original pre-denominational Church
- Catholic vs. Protestant beliefs: water baptism and salvation

Catholic Church: direct continuation of the church founded by Jesus Christ
Catholicism is considered a denomination of Christianity. According to Catholic tradition, the Catholic Church is a direct continuation of the early Christian community established by the Disciples of Jesus. The Church considers its bishops to be the successors to Jesus's apostles, and the Church's leader, the Bishop of Rome (also known as the Pope), to be the sole successor to St. Peter, who was appointed by Jesus as the head of the Church.
The history of the Catholic Church is steeped in tradition and theology. According to Catholic belief, the Church is the "continuing presence of Jesus on Earth" and possesses the means for salvation. The Church's liturgy and sacraments are believed to perpetuate the graces achieved through Christ's sacrifice, strengthening individuals' relationships with Christ and aiding in overcoming sin. This belief in the salvific role of the Church is a core tenet that distinguishes Catholicism.
The Catholic Church traces its origins to the day of Pentecost, which occurred fifty days after Christ's resurrection. At Pentecost, the apostles are believed to have received the Holy Spirit, empowering them to lead the Church. This event is considered the beginning of the public ministry of the Catholic Church. The New Testament, particularly the Gospels and the Acts of the Apostles, records Jesus' activities, teachings, and the spread of the early Church throughout the Roman Empire.
The Catholic Church has played a significant role in the history of Western civilization. With over 1.2 billion baptized Catholics worldwide, it is the largest Christian church and one of the oldest and most prominent international institutions. The Church consists of autonomous churches, including the Latin Church and Eastern Catholic Churches, overseen by bishops.
The core beliefs of Catholicism are outlined in the Nicene Creed, which describes the Church as "one, holy, catholic, and apostolic." The Catholic Church teaches that it is the "one true church" founded by Jesus Christ and that its founder is Jesus Christ himself. This belief in being the original and authentic form of Christianity is central to Catholic doctrine and sets it apart from other Christian denominations.
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Catholic doctrine: salvation through sacramental confession and penance
Catholicism is considered a denomination of Christianity. As Catholics, we say that the one true form of Christianity is Catholicism. Jesus invested the truth in his apostles, who then passed it on to their successors. Other religions, like the thousands of denominations of Protestantism, sprang up when this truth was corrupted and people attempted to change it to suit their beliefs.
The Catholic Church teaches that sacramental confession to a priest is necessary for salvation. This is based on the belief that Jesus entrusted the ministry of reconciliation to the Church, and that the Sacrament of Penance is God's gift to us so that any sins committed after Baptism can be forgiven. During the Sacrament of Penance, also called the Sacrament of Reconciliation or Confession, Catholics confess their mortal sins and may confess their venial sins for devotional reasons. This sacrament is seen as a holy moment in which one honestly acknowledges their sins and is reconciled to God and the Church.
The official Catholic teaching on salvation through sacramental confession is found in the Canons and Decrees of the Council of Trent:
> "If anyone denies that sacramental confession was instituted by divine law or is necessary to salvation; or says that the manner of confessing secretly to a priest alone [...] is at variance with the institution and command of Christ and is a human contrivance, let him be anathema" (Canon VI).
This doctrine has been a source of controversy, as it contradicts 1 Timothy 2:5, which states, "There is one God and one mediator between God and mankind, the man Christ Jesus." Despite this, Catholics believe that confession to a priest is a crucial step in obtaining forgiveness and salvation.
The Sacrament of Penance has been a subject of discussion and revision within the Catholic Church. In the mid-16th century, the bishops at the Council of Trent retained the private nature of the sacrament and decreed that indulgences could not be sold. Later, the Second Vatican Council (1962-1965) called for a revision of the rite and formulas to better express the nature and effect of the sacrament. In 1978, Catholic theologian Ladislas Orsy argued for a wider use of community reconciliation services without requiring individual confession, anticipating further developments in the Church's legislation on the Sacrament of Reconciliation.
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Catholic vs. Protestant: the Reformation and violation of the Bible
Catholicism and Protestantism are two denominations of Christianity, with distinct views on the meaning and authority of the Bible. The Catholic Church sees itself as the only true church worldwide, under the leadership of the pope, who is seen as the successor of the Apostle Peter, the first head of the church, appointed by Jesus. On the other hand, Protestant churches that emerged from the Reformation do not form a united church. Instead, there are tens of thousands of different denominations worldwide, all considered equal.
The Reformation, which began in the 16th century in Germany, divided the church into Catholic and Protestant denominations. The movement was started by Catholic monk Martin Luther, who set out to reform the Catholic Church but instead became the founder of a second Christian confession. Luther's 95 Theses criticised the Catholic Church's practices, including the selling of indulgences, which granted people the power to purchase a pardon for their sins. Luther emphasised the Bible as the highest source of authority for the church, marking a critical yet serious reading of scripture. This is reflected in the Latin phrase "sola scriptura", meaning that the Bible is the "Sola Skriptura", or God's only book, through which he provided his revelations.
Catholics, on the other hand, do not base their beliefs solely on the Bible. In addition to the Holy Scripture, they follow the traditions of the Roman Catholic Church, including the veneration of Mary, the mother of Jesus, as the "Queen of Heaven", and the veneration of saints. These practices are rejected by Protestants due to a lack of biblical references and support. Protestants believe that every person may and should pray directly to God, rather than through saints or other intermediaries.
The Protestant doctrine of perspicuity, or clarity, holds that the Bible is clear and accessible enough to interpret itself and guide believers. This belief in the plain meaning of Scripture led to a focus on individual interpretation and a rejection of the Catholic Church's role as a mediator between people and God. However, the interpretation of the Bible's "plain meaning" has proven challenging, leading to a reliance on secondary authorities and contributing to the diverse and subjective nature of Protestantism.
While both Catholics and Protestants consider themselves Christians, they differ in their interpretation of the Bible and the role of the church. The Reformation highlighted these differences and led to a lasting divide between the two denominations.
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Catholic vs. Orthodox: the original pre-denominational Church
Catholicism and Orthodox Christianity are two of the main branches of Chalcedonian Christianity, the other being Protestantism. The Catholic Church, which has over 1.3 billion members or 50.1% of all Christians worldwide, does not view itself as a denomination, but as the original pre-denominational Church. The Eastern Orthodox Church, officially the Orthodox Catholic Church, also considers itself pre-denominational, claiming continuity with the early Church as part of the state church of Rome. It is the second-largest single denomination of Christianity, with an estimated 230 million adherents.
The greatest divisions in Christianity today are between the Eastern and Oriental Orthodox, Catholics, and the various denominations formed during and after the Protestant Reformation. The Catholic Church is composed of 24 autonomous sui iuris particular churches: the Latin Church and the 23 Eastern Catholic Churches. It considers itself the one, holy, catholic, and apostolic Church that Christ founded, and which Saint Peter initiated along with the missionary work of Saint Paul and others.
The Orthodox Church, on the other hand, is divided into Eastern Orthodoxy, Oriental Orthodoxy, and the Church of the East. While the Eastern Orthodox Church considers itself to be the one true church, pre-denominational, and the original Church of Christ before 1054, some scholars suggest the Eastern Orthodox and Catholic churches began after the East-West Schism. The Eastern Orthodox Church had about 230 million members as of 2019.
There are several differences between the Catholic and Orthodox Churches. For instance, the Immaculate Conception is a Catholic dogma that says the Theotokos was conceived without the stain of original sin, which made it possible for her to assent to Christ's Incarnation. While the Orthodox agree that Mary’s womb was sanctified to prepare for Christ, they believe this took place at the Annunciation. The Orthodox maintain the approach of the Church Fathers, viewing sin as an illness in need of healing, not a condition of guilt requiring retribution.
Another difference is in the issue of salvation. The official Catholic teaching is that people who do not confess their sins to a human priest cannot be saved and are, in fact, cursed for eternity. This doctrine contradicts 1 Timothy 2:5, which could not be clearer in renouncing the Catholic doctrines of Mary and the priesthood: “There is one God and one mediator between God and mankind, the man Christ Jesus.”.
Catholics consider themselves to be the original and true form of Christianity, with other denominations being referred to as "schismatics" and "heretics".
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Catholic vs. Protestant beliefs: water baptism and salvation
Catholicism is a denomination of Christianity. There is one Catholic Church that has been consistent for 2,000 years, whereas there are tens of thousands of Protestant denominations. Catholics consider Catholicism to be the one true form of Christianity, with other religions like the thousands of denominations of Protestantism springing up when this truth was corrupted and people attempted to change it to suit their own views, agenda, and beliefs.
Both Catholics and Protestants teach that faith in Jesus Christ is necessary for a person to be saved. However, they disagree on the role of water baptism in salvation.
In Catholicism, baptism is considered one of the seven sacraments and is "necessary for salvation". The Catholic Catechism (#1277) teaches that, "In accordance with the Lord’s will, [baptism] is necessary for salvation". Catholics believe that baptism is "the sacrament of faith", and that it is the normal way that people express their faith in Jesus Christ.
Protestants, on the other hand, believe that it is faith alone that is necessary for salvation, not baptism. They follow Paul, who says that all works, including baptism or circumcision, are optional. They understand baptism to be a symbol of a person's faith, not a requirement for salvation. Some Protestants believe that there are cases where salvation can be obtained without baptism, and that it is only the contempt of baptism, not the lack of it, that condemns.
Despite these differences, there is some overlap in the beliefs of Catholics and Protestants regarding baptism. Both groups recognize the importance of baptism as a rite of passage and a symbol of a person's entry into the Christian faith. Additionally, both Catholics and Protestants acknowledge the validity of each other's baptisms, with the Lutheran and Reformed Churches recognizing Catholic baptism, and vice versa.
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Frequently asked questions
Catholicism is a denomination of Christianity. There are several denominations of Christianity, including Catholicism, Protestantism, and Orthodox Christianity.
The Catholic Church teaches that it is the one true form of Christianity and that all other denominations are heretical. Other denominations, such as the Eastern Orthodox Church, make similar claims. Catholicism is considered to be much closer to Ancient Christianity than Protestantism.
Some Protestant denominations do not allow divorce or alcohol consumption, while Catholics do, but within reason. Some Protestant denominations also practice charismatic worship, which aims to induce emotional religious experiences.











































