What do Catholics believe?

Other Beliefs & ReligionsIn theological review

The short answer

Catholics hold the faith of the creeds: one God, Father, Son and Holy Spirit, and Jesus truly God and truly man, crucified and risen. The Catechism of the Catholic Church is the church's official summary. Catholics differ from Protestants chiefly over authority, since Scripture and Tradition are received together under the magisterium, and over how a sinner is justified, the Mass, purgatory, and prayer to Mary and the saints. Scripture answers that a person is justified by faith, and that Christ is the one mediator between God and man.

The fuller answer

The Catechism of the Catholic Church, the church's official summary, presents a faith that shares a great deal with other Christians. Catholics confess one God in three persons, Jesus Christ as true God and true man, his death and resurrection, baptism, the Eucharist, and a final judgment. The Catechism also teaches that Scripture and sacred Tradition together form the deposit of faith, interpreted by the magisterium, the teaching office of the pope and bishops. Protestants and Catholics agree on the creeds themselves. The disagreements begin over what stands beside them.

For we maintain that a man is justified by faith apart from works of the law.

Romans 3:28 (BSB)

Justification is the sharpest difference. The Catechism teaches that grace is infused through the sacraments, beginning with baptism, and that the justified person cooperates with grace and can grow in righteousness and also lose it. The Council of Trent, answering the Reformation, rejected the claim that a sinner is justified by faith alone. Paul states the opposite side plainly: a person is justified by faith apart from works of the law. Contend states this difference honestly, without pretending it is small, because both churches themselves have always treated it as real.

For it is by grace you have been saved through faith, and this not from yourselves; it is the gift of God,

Ephesians 2:8 (BSB)

Grace, then, is received differently in the two accounts. In the Catholic account the sacraments are the ordinary channels by which justifying grace is given and increased, and the Mass is taught as a sacrifice that re-presents the one sacrifice of Christ. Paul describes salvation as God's gift through faith, not a result of works, so that no one may boast. Catholics reply that faith without love is dead, a point Protestants also affirm. The live question is whether works are the root of acceptance with God or its fruit.

For there is one God, and there is one mediator between God and men, the man Christ Jesus,

1 Timothy 2:5 (BSB)

Prayer shows the same pattern. The Catechism is careful, and should be quoted fairly: Mary is not worshipped as God, and Catholic teaching calls devotion to her different in kind from adoration of God. Yet Catholics do ask Mary and the saints to intercede, and the Catechism commends that practice. Paul names one mediator between God and man, the man Christ Jesus. That verse, read plainly, is where the conversation belongs: not on caricatures of Catholic devotion, but on whether one mediator is enough.

Sources

Berean Standard Bible (BSB)
Catechism of the Catholic Church (2nd ed., 1997)
Council of Trent, Fourth Session (1546)

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Why do Catholic Bibles have more books?Because the Roman Catholic Church counts an extra group of ancient Jewish writings, the deuterocanonical books, as Scripture, and Protestant churches follow the shorter Hebrew canon that Jesus and the apostles used. The books themselves are old and were widely read. The disagreement is about their authority, and it was fixed formally at the Council of Trent in 1546.Do all religions lead to God?No, and the reason is not tribal loyalty: the faiths contradict each other about God, sin, and salvation, so they cannot all be roads to the same place. More decisively, Jesus did not present himself as one guide among many, saying, I am the way and the truth and the life; no one comes to the Father except through me. Christians can respect their neighbours of other faiths, and should, without pretending the differences are small.What is the gospel?The gospel is the good news of what God has done in Jesus Christ: he died for our sins according to the Scriptures, he was buried, and he was raised on the third day according to the Scriptures. It is news before it is advice: a death that pays for sin, a resurrection that proves it, and a living Lord who is to be confessed, believed, and followed.How can I be saved?By grace through faith in Jesus Christ, and not by anything you contribute. Ephesians says it outright: it is the gift of God, not by works, so that no one can boast. To be saved is to turn from your sin, confess Jesus as Lord, and trust that God raised him from the dead for you. The rest of your life is learning to live from that gift.