Terms distinctive to Roman Catholicism and Eastern Orthodoxy — the vocabulary that does not overlap with the shared Christian glossary.
Alphabet Navigation
A · B · C · D · E · F · H · I · L · M · O · P · R · S · T · V
A
Anathema (Catholic) — A formal conciliar condemnation excluding a doctrine and its holders from the church. Trent attached anathemas to denials of its teaching on justification, including the denial that works contribute to it.
Christian contrast: Paul reserves anathema for those who preach a different gospel — specifically one that adds works to grace (Galatians 1:8–9). The direction of the curse is the whole dispute.
Ancestral Sin (Orthodox) — The Orthodox alternative to Augustinian original sin: humanity inherits mortality and corruption from Adam, but not his personal guilt.
Christian contrast: Romans 5:18–19 says condemnation and being made sinners came through one man's transgression — the language is judicial, not merely medical. → Sin & Its Consequences · The Fall of Man
Apostolic Succession (Catholic, Orthodox) — The doctrine that valid ministry derives from an unbroken chain of episcopal ordination reaching back to the apostles. Sacramental validity is held to depend on it.
Christian contrast: The New Testament's test for legitimacy is fidelity to apostolic teaching, not to a lineage (Acts 17:11; Galatians 1:8; 2 Timothy 2:2).
Assumption of Mary (Catholic) — The dogma, defined by Pius XII in 1950, that Mary was taken bodily into heaven at the end of her earthly life.
Christian contrast: Scripture is silent, and a doctrine defined in 1950 as binding for salvation cannot have been part of the faith "once for all handed down" (Jude 3).
B
Beatification (Catholic) — The step preceding canonization, declaring a deceased person "Blessed" and permitting limited public veneration. Normally requires a verified miracle.
Christian contrast: The New Testament calls every living believer a saint (1 Corinthians 1:2; Ephesians 1:1) — a status conferred at conversion, not certified posthumously.
C
Canonization (Catholic, Orthodox) — Official declaration that a deceased person is in heaven and may be venerated and invoked church-wide.
Christian contrast: See Beatification. Invoking the canonized also runs against the one-Mediator clause of 1 Timothy 2:5.
Catechism of the Catholic Church (Catholic) — The authoritative compendium of Catholic doctrine, promulgated in 1992 under John Paul II.
Christian contrast: A useful and honest source to quote when engaging Catholic doctrine — arguments built on caricature collapse the moment a Catholic opens it. → Is Purgatory Biblical?
Chrismation (Orthodox) — Anointing with holy myrrh immediately after baptism, conferring the gift of the Holy Spirit. The Orthodox equivalent of confirmation, administered to infants.
Christian contrast: The Spirit is received by faith at conversion, not through a subsequent rite (Ephesians 1:13–14; Galatians 3:2).
Concupiscence (Catholic) — The disordered inclination toward sin remaining after baptism. Catholic teaching holds it is not itself sin unless consented to.
Christian contrast: Scripture treats the inward desire as already culpable — Jesus locates adultery in the look (Matthew 5:28), and Paul calls indwelling sin sin (Romans 7:17, 20).
Confession (Sacrament of Penance) (Catholic, Orthodox) — Auricular confession of sins to a priest, followed by absolution and assigned penance. Catholic teaching requires it for mortal sins.
Christian contrast: Believers confess directly to God, who is faithful to forgive (1 John 1:9), and to one another for mutual healing (James 5:16) — never to a mediating priest with absolving power.
D
Deuterocanon (Catholic, Orthodox) — The books Catholics and Orthodox accept as canonical Old Testament Scripture that Protestants classify as Apocrypha: Tobit, Judith, Wisdom, Sirach, Baruch, 1–2 Maccabees, plus additions to Esther and Daniel. Orthodoxy accepts several more.
Christian contrast: These books were absent from the Hebrew canon Jesus used, are never quoted as Scripture in the New Testament, and 2 Maccabees 12 is the sole textual basis for prayers for the dead. → Is Purgatory Biblical?
Dulia / Hyperdulia / Latria (Catholic) — The threefold distinction of honor: dulia to saints, hyperdulia to Mary, and latria (adoration) to God alone. Used to answer the charge of idolatry.
Christian contrast: The distinction is real in the manuals and largely invisible in practice. Scripture records angels and apostles refusing even the lesser honor (Revelation 22:8–9; Acts 10:25–26).
E
Ex Opere Operato (Catholic) — "From the work worked." The teaching that a validly administered sacrament confers grace by the act itself, independent of the minister's worthiness.
Christian contrast: Scripture ties benefit to faith, not to mechanism — the word did not profit those who heard it "not being united by faith" (Hebrews 4:2).
F
Filioque (Catholic vs. Orthodox) — The Latin phrase "and the Son," added by the West to the Nicene Creed so that the Spirit proceeds from the Father and the Son. Orthodoxy rejects both the doctrine and the unilateral alteration of an ecumenical creed. A principal cause of the 1054 schism.
Christian contrast: John 15:26 has the Spirit proceeding from the Father and being sent by the Son — language the East and West each pressed in one direction. Scripture-only framing declines to make either formula a test of fellowship.
H
Hesychasm (Orthodox) — A contemplative tradition of inner stillness and repetition of the Jesus Prayer, aimed at perceiving the uncreated divine light. Defended by Gregory Palamas in the fourteenth century.
Christian contrast: Scripture's means of knowing God are the Word, prayer, and the ordinances — never a technique yielding visionary experience (2 Timothy 3:16–17; Colossians 2:18–19).
I
Icon (Orthodox) — A painted image of Christ, Mary, or a saint, venerated as a "window into heaven." Defended at Nicaea II (787) on the ground that the incarnation makes God depictable.
Christian contrast: The Second Commandment prohibits making images for religious veneration (Exodus 20:4–5), and God gave Israel no form at Sinai precisely so they would not make one (Deuteronomy 4:15–16).
Immaculate Conception (Catholic) — The dogma, defined by Pius IX in 1854, that Mary was preserved free from original sin from the moment of her conception. Frequently confused with the virgin birth of Christ.
Christian contrast: Mary called God "my Savior" (Luke 1:47) — the word of someone who needed saving. And "all have sinned" admits no exception (Romans 3:23).
Indulgence (Catholic) — The remission of temporal punishment due to forgiven sin, granted from the Treasury of Merit under specified conditions. The trigger of the Reformation in 1517.
Christian contrast: The doctrine presupposes an unpaid remainder after Calvary — exactly what "It is finished" (John 19:30) and Hebrews 10:14 exclude. → Is Purgatory Biblical?
Infused Righteousness (Catholic) — The teaching that justifying grace is poured into the soul, making the person actually righteous over time. Contrasted with imputation.
Christian contrast: Paul's language is forensic — God "justifies the ungodly," crediting righteousness apart from works (Romans 4:5–6; 2 Corinthians 5:21). Sanctification is real, but it is not justification. → Faith vs Works · Living Under Grace
L
Limbo (Catholic, historical) — The theological hypothesis of a state of natural happiness for unbaptized infants, excluded from the beatific vision but not punished. Never dogma; effectively set aside by the Vatican in 2007.
Christian contrast: Its quiet abandonment illustrates the problem with baptismal regeneration — the doctrine created a pastoral crisis that Scripture never creates.
M
Magisterium (Catholic) — The teaching authority of the Church, vested in the pope and bishops in communion with him. Held to be the authoritative interpreter of Scripture and Tradition.
Christian contrast: The Bereans were commended for testing an apostle against Scripture (Acts 17:11). An interpreter that cannot in principle be corrected by the text it interprets has become the higher authority.
Mariology (Catholic, Orthodox) — The body of doctrine concerning Mary: Theotokos, perpetual virginity, immaculate conception, assumption, and — proposed but not defined — mediatrix and co-redemptrix.
Christian contrast: Scripture honors Mary as blessed among women (Luke 1:42) and then goes quiet. Jesus deflected a blessing on her womb toward those who hear and keep God's word (Luke 11:27–28).
Mass (Catholic) — The central act of Catholic worship, in which the Eucharist is offered as a true and propitiatory sacrifice, re-presenting Calvary without repeating it.
Christian contrast: Hebrews contrasts priests who "stand daily" offering repeated sacrifices with Christ who offered one sacrifice and sat down (Hebrews 10:11–14). The posture is the argument.
Mortal vs. Venial Sin (Catholic) — Mortal sin (grave matter, full knowledge, deliberate consent) destroys sanctifying grace and merits hell unless confessed; venial sin wounds but does not destroy it.
Christian contrast: Scripture grades sins in seriousness (John 19:11) but never divides them into salvation-destroying and non-destroying categories. James 2:10 cuts the other way.
O
Original Justice (Catholic) — The state of grace and integrity Adam held before the Fall, lost by sin and restored through baptism.
Christian contrast: Scripture describes Adam as very good and upright (Genesis 1:31; Ecclesiastes 7:29) without the superadded-grace framework the term assumes. → The Fall of Man
P
Papal Infallibility (Catholic) — Defined at Vatican I (1870): the pope cannot err when defining doctrine on faith or morals ex cathedra. Invoked explicitly only for the Assumption (1950), and arguably the Immaculate Conception (1854).
Christian contrast: Peter, the alleged first pope, was publicly rebuked by Paul for behavior that compromised the gospel (Galatians 2:11–14) — an awkward precedent for the office.
Purgatory (Catholic) — A state of purification after death for the saved, discharging the temporal punishment remaining on forgiven sins before entry into heaven. Not a third destiny — everyone in purgatory is going to heaven.
Christian contrast: The doctrine requires a remainder after Calvary. The New Testament's atonement vocabulary — perfect-tense verbs, "once for all," "paid in full" — was selected to exclude one. → Is Purgatory Biblical?
R
Relic (Catholic, Orthodox) — The physical remains of a saint, or an object touched by one, venerated and often held to mediate grace or healing. Required in Catholic altars.
Christian contrast: God worked through Paul's handkerchiefs once (Acts 19:11–12), but Scripture never institutionalizes it — and Hezekiah destroyed the bronze serpent when Israel began burning incense to it (2 Kings 18:4).
Rosary (Catholic) — A devotional cycle of prayers counted on beads, dominated by repetitions of the Hail Mary, structured around meditation on the mysteries of Christ's life.
Christian contrast: Jesus specifically warned against "meaningless repetition" in prayer, "for they suppose that they will be heard for their many words" (Matthew 6:7).
S
Sacramental (Catholic) — A sacred sign — holy water, blessings, scapulars, medals — instituted by the Church rather than Christ, disposing the recipient to receive grace.
Christian contrast: Christ instituted two ordinances, and Colossians 2:20–23 warns against regulations that "have the appearance of wisdom" but no power against the flesh.
Sacred Tradition (Catholic, Orthodox) — The unwritten apostolic deposit transmitted through the Church, held to be a source of revelation alongside Scripture and interpreted by the Magisterium.
Christian contrast: Jesus confronted exactly this structure — "you invalidated the word of God for the sake of your tradition" (Matthew 15:6). Scripture alone is God-breathed (2 Timothy 3:16–17).
Seven Sacraments (Catholic, Orthodox) — Baptism, Confirmation/Chrismation, Eucharist, Penance, Anointing of the Sick, Holy Orders, and Matrimony. Held to convey grace ex opere operato.
Christian contrast: The number was fixed only in the twelfth century and dogmatized at Trent. Christ instituted two: baptism and the Lord's Supper (Matthew 28:19; 1 Corinthians 11:23–26).
Supererogation (Catholic) — Good works exceeding what duty requires, whose surplus merit contributes to the Treasury of Merit.
Christian contrast: Jesus closed this door: after doing everything commanded, say "We are unworthy slaves; we have done only that which we ought to have done" (Luke 17:10).
T
Theosis (Deification) (Orthodox) — The Orthodox account of salvation as progressive participation in the divine energies — becoming by grace what God is by nature. Grounded in 2 Peter 1:4.
Christian contrast: Scripture promises conformity to Christ's image (Romans 8:29) and a share in the divine nature, but preserves an absolute Creator–creature distinction. The creature never crosses over. → Glorification · Humanity - Imago Dei
Theotokos (Catholic, Orthodox) — "God-bearer," the title affirmed at Ephesus (431). Its original purpose was christological — safeguarding that the one born of Mary is a single divine person — not Marian elevation.
Christian contrast: The title is defensible on its original terms; Scripture-only objection is to its later use as a foundation for Marian devotion Scripture never authorizes. → The Incarnation
Transubstantiation (Catholic) — Defined at Lateran IV (1215) and Trent: at consecration the substance of bread and wine becomes the substance of Christ's body and blood, while the accidents remain unchanged.
Christian contrast: Jesus spoke the words while physically present holding the bread, and John 6:63 supplies His own key — "the flesh profits nothing; the words that I have spoken to you are spirit and are life."
Treasury of Merit (Catholic) — The accumulated superabundant merits of Christ and the saints, from which the Church dispenses indulgences.
Christian contrast: Only Christ's merit exists to draw on, and it is not dispensed in portions — it is imputed whole to everyone who believes (Romans 4:5; 2 Corinthians 5:21). → Is Purgatory Biblical? · Faith vs Works
V
Veneration of Saints (Catholic, Orthodox) — Honoring canonized saints and requesting their intercession, distinguished in Catholic theology from the worship due to God alone.
Christian contrast: "There is one God, and one mediator also between God and men, the man Christ Jesus" (1 Timothy 2:5). Scripture also forbids seeking contact with the dead (Deuteronomy 18:10–12).