Scripture · History · Tradition
In-depth articles on the teachings most often questioned.
The Catholic Church teaches that at the consecration, bread and wine truly become the Body and Blood of Christ, not merely symbols.
The Mass is not a mere memorial meal but the one sacrifice of Christ on Calvary made sacramentally present on the altar.
The apostles ordained successors by the laying on of hands, and this unbroken chain of ordination continues in the bishops of the Catholic Church today.
Christ gave Peter a unique role as chief shepherd of the Church, an office that continues in the Bishop of Rome.
When the Pope solemnly defines a doctrine of faith or morals for the whole Church, the Holy Spirit preserves him from error, a narrow and carefully defined charism.
Divine revelation comes to us through both Scripture and the living Tradition handed on by the apostles, two modes of one deposit of faith.
The list of books belonging to the Bible was not self-evident but was discerned and authoritatively settled by the Church over centuries.
The claim that Scripture alone is the sole rule of faith is neither taught by Scripture itself nor practiced by the early Church.
Justification is a real, gradual transformation worked by grace, not merely a legal declaration while sin remains unchanged within.
Saving faith is a living faith that necessarily bears fruit in works of love; faith without works is dead.
Souls who die in God's friendship but still imperfectly purified undergo a final cleansing before entering the joy of heaven.
An indulgence is the remission before God of the temporal punishment due to sins already forgiven, granted through the Church's ministry.
The Church on earth, the souls being purified, and the saints in heaven form one Body of Christ united in love and mutual prayer.
Asking the saints in heaven to pray for us is not worship of them but a request for intercession, just as we ask fellow Christians on earth to pray for us.
From the first moment of her existence, Mary was preserved free from original sin by a singular grace in view of Christ's future merits.
Mary remained a virgin before, during, and after the birth of Jesus, a teaching held by the whole ancient Church including the earliest Reformers.
At the end of her earthly life, Mary was taken body and soul into heavenly glory, a fitting anticipation of the resurrection promised to all believers.
Because Jesus is one divine Person with two natures, Mary who bore him is rightly called Theotokos, the Mother of God.
Baptism is not merely a symbol but truly washes away original sin and incorporates the recipient into Christ, a grace fittingly extended to infants.
Confirmation completes baptismal grace by a special outpouring of the Holy Spirit, strengthening the believer to live and defend the faith.
Christ gave the apostles authority to forgive sins in his name, an authority exercised in the Church through the sacrament of Confession.
The Church anoints the seriously ill and dying with holy oil, uniting their suffering to Christ's and imparting grace of strength, peace, and sometimes healing.
Holy Orders configures a man to Christ the Priest for sacramental ministry, and the Latin Church has long fostered priestly celibacy as a sign of undivided devotion to Christ.
Christ raised marriage between the baptized to a sacrament and taught that a valid, consummated marriage cannot be dissolved by any human power.
Because God himself took a visible human nature in Christ, the Church may fittingly depict Christ and the saints in images used to aid, not replace, worship of God.
Since some souls need further purification after death, the Church has always prayed and offered the Eucharist for the faithful departed.
Throughout the New Testament, Peter consistently appears first among the apostles, speaking and acting as their spokesman and leader.
God has written a moral law on every human heart, knowable by reason even apart from revelation, which the Church's moral teaching articulates and applies.
The Church teaches that the unitive and procreative meanings of the marital act belong inseparably together, so deliberately closing it to new life distorts its meaning.
Human reason, unaided by revelation, can arrive at certainty of God's existence by reflecting on the world's contingency, order, and finality.
God is one in nature and three in Persons—Father, Son, and Holy Spirit—a central mystery revealed by Christ himself and confessed by the Church from the beginning.
Jesus of Nazareth is not merely a prophet or a good teacher but true God, the eternal Word made flesh, a claim rooted in Scripture and confessed unanimously by the earliest Christians.
The bodily resurrection of Jesus is not a pious legend but an event supported by an unusually strong convergence of historical evidence, including the empty tomb, the post-mortem appearances, and the transformed apostles.
The New Testament documents meet and exceed the standards historians normally apply to ancient texts, being far better attested in manuscripts and closer to the events than most classical works accepted as reliable history.
Human reason, without the aid of revelation, can arrive at certainty about God's existence by reflecting on the contingency, motion, and order found in the created world.
The existence of suffering does not disprove God's existence; rather, understood in light of free will, sin, and Christ's own suffering, it reveals a God who respects human freedom and enters into our suffering to redeem it.
Objective moral obligations that bind all people everywhere point beyond human convention to a transcendent lawgiver, and this natural law is written on the human heart and knowable by reason.
The liturgy of the first three centuries, as attested by writers like Justin Martyr and the Didache, already contains the recognizable structure of the Catholic Mass: Scripture readings, a homily, intercessions, and the Eucharistic sacrifice.
Catholic dogmas defined centuries after the apostles are not inventions but the organic unfolding of truths implicitly contained in the original apostolic deposit of faith, like a seed growing into a tree.
From Nicaea in 325 to Vatican II, the Church's ecumenical councils have gathered bishops from the whole world under papal authority to define doctrine, refute heresy, and guide the Church's life with the promised assistance of the Holy Spirit.
Gnosticism, Arianism, Nestorianism, and Monophysitism each distorted essential truths about Christ or creation, and the Church's response to them, guided by Scripture and Tradition, clarified and defended the authentic apostolic faith.
The 16th-century Reformation arose from genuine abuses in the Church, especially around indulgences, but its theological break with sola scriptura and sola fide went beyond correcting corruption and fractured Christian unity.
Christ established a living teaching authority in his Church, the Magisterium, exercised by the Pope and bishops in communion with him, to authentically interpret Scripture and Tradition for every generation.
The Catholic Old Testament includes seven books—Tobit, Judith, Wisdom, Sirach, Baruch, and 1-2 Maccabees—that were part of the Greek Septuagint used by the apostles and were affirmed by early councils, before being removed by the Reformers in the 16th century.
In the Incarnation, the eternal Son of God assumed a complete human nature, becoming truly man while remaining truly God, one divine Person subsisting in two natures without confusion or division.
Independent episcopal lists compiled in different regions within a few generations of the apostles converge on the same names, giving strong historical grounding to the doctrine of apostolic succession.