Nontrinitarian Christian Groups

1. What "Nontrinitarian" Means

A nontrinitarian body is one that uses the Bible, honours Jesus Christ and calls itself Christian while denying the doctrine that the one God exists as three distinct and co-equal Persons: Father, Son and Holy Spirit. The label describes a doctrine of God rather than a style of worship, a moral standard or an organisational structure. The Church of Jesus Christ of Latter-day Saints, Jehovah's Witnesses, the Oneness Pentecostal churches, the Christadelphians, the Church of Christ, Scientist, the Unitarian Universalist Association, the Iglesia ni Cristo and La Luz del Mundo all fall under it, and they disagree with each other about God as sharply as they disagree with Nicaea.

Three cautions belong at the top. The first is that this page assesses teaching, and teaching alone. Whether a group pressures its members, controls their friendships or punishes those who leave is a separate question with its own tests, and our guide to recognising controlling religious groups handles that question using behavioural criteria. A body can be doctrinally orthodox and behave abusively, and a body can hold a defective doctrine of God while treating its members with real kindness. Keep the two enquiries apart, because collapsing them produces bad judgments in both directions.

The second caution is about the word "cult", which this page does not use as a label. In ordinary speech it has become a term of abuse that carries no information, and applied to a neighbour it ends a conversation before it starts. Naming what a body teaches about God is precise, checkable, and something its own members will recognise. Calling it a cult is none of those things.

The third caution is that most people in these communities are sincere, prayerful and generous, and many of them would object strongly to being listed here. Latter-day Saints regard themselves as Christians and say so with some heat. Oneness Pentecostals believe they honour the deity of Christ more highly than Trinitarians do. Describing what each body teaches is a service to everyone involved, including its members, who deserve to have their position stated as they actually hold it.

2. Nicaea, Arius and the Word Homoousios

The Council of Nicaea in 325 settled the question of whether Jesus Christ is God in the same sense the Father is God, and it settled it with one Greek word, homoousios, meaning "of the same being" or "of one substance" with the Father. That word is the boundary marker every nontrinitarian body stands outside of, so it is worth knowing exactly what it was chosen to exclude.

What Arius Actually Taught

Arius was a priest of Alexandria who wanted to protect the absolute uniqueness of God. If God alone is unbegotten, uncreated and without beginning, he reasoned, then the Son, who is begotten, must have a beginning. Arius therefore taught that the Son is the first and greatest of all God's works, made before time and through whom everything else was made, exalted far above every creature and rightly given honour, yet a creature all the same. His slogan, preserved by his opponents, was that "there was when he was not." Arianism was a serious and intelligent position, argued from Scripture by learned men, and for much of the fourth century it held most of the eastern episcopate. Any account that treats it as obvious nonsense has not understood why it took a century to answer.

Why the Council Refused the Compromise Word

A rival party proposed homoiousios, "of similar being", which differs by a single letter and would have satisfied nearly everyone. The council refused it, because "similar" leaves the Son on the creature's side of the line, and if the Son is a creature then a creature is being worshipped, a creature is being prayed to, and the salvation Christians claim rests on someone who is not God. Athanasius of Alexandria pressed this argument for forty-five years and through five exiles: only God can save, so if Christ is not God, Christians are not saved. The Council of Constantinople in 381 completed the work by confessing the Holy Spirit as "the Lord, the giver of life, who proceeds from the Father, who with the Father and the Son is adored and glorified." The creed recited at Mass across the world every Sunday is the text those two councils produced.

The Catechism states the settled doctrine in the plainest available terms: "The Trinity is One. We do not confess three Gods, but one God in three persons" (CCC 253), and "The divine persons are really distinct from one another" (CCC 254). Both halves of that are load-bearing. Deny the first and you have three gods. Deny the second and you have one God wearing three masks. Every nontrinitarian body on this page fails one half or the other. Our full guide to the doctrine of the Trinity works through the positive case, the Greek and Latin vocabulary, and the analogies that help and those that mislead.

3. The Scripture Behind the Doctrine

The word "Trinity" does not appear in the Bible, and nontrinitarian groups make that point early in almost every conversation. The Catholic answer is that the doctrine is the summary of what the Bible says in many places at once, and that the summary was needed precisely because the biblical data resists any simpler arrangement. Three streams of text run through the New Testament and every proposed solution has to hold all three.

One God

The first stream is the unyielding monotheism the Church inherits from Israel: "Hear, O Israel: The Lord our God, the Lord is one" (Deuteronomy 6:4), repeated by Jesus himself as the first commandment (Mark 12:29). Paul writes that "there is no God but one" (1 Corinthians 8:4). Christianity has never proposed a committee of deities, and the charge that Trinitarians worship three gods misses the doctrine entirely.

The Son Is God

The second stream is the New Testament's application of divine titles, divine acts and divine worship to Jesus. Thomas addresses the risen Christ as "My Lord and my God" and is commended for it (John 20:28). John's prologue says the Word was God and that all things were made through him (John 1:1-3). Paul writes that in Christ "all the fullness of the Deity lives in bodily form" (Colossians 2:9) and that he existed "in very nature God" (Philippians 2:6). Hebrews quotes Psalm 45 and applies it to the Son: "Your throne, O God, will last for ever and ever" (Hebrews 1:8). Jesus says "Before Abraham was born, I am" (John 8:58), and his hearers pick up stones. He says "I and the Father are one" (John 10:30), and they do it again.

The Spirit Is God and Is Personal

The third stream concerns the Holy Spirit, whom Peter identifies with God directly: lying to the Holy Spirit is lying "to God" (Acts 5:3-4). The Spirit teaches, intercedes, can be grieved, distributes gifts as he wills, and speaks in the first person (John 14:26, Romans 8:26, Ephesians 4:30, 1 Corinthians 12:11, Acts 13:2). Those are the acts of someone rather than the operations of a force. Our guide to who the Holy Spirit is takes this further.

The three streams converge in the command that opens the Christian life: "Go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:19). One name, three Persons, spoken over every believer. Paul's blessing does the same in the reverse order (2 Corinthians 13:14). The doctrine of the Trinity is the Church's attempt to say all three of those things at once without dropping any, and every nontrinitarian scheme solves the difficulty by letting one of them go.

4. Why Baptism Is Where This Becomes Practical

For most readers the doctrine of God becomes a practical question at exactly one point: whether the baptism they received in a nontrinitarian body is recognised, and whether they will be asked to be baptised again. The Catholic answer rests on two requirements that have to be met together, and they are short enough to state exactly.

Water and the Trinitarian Form

A valid baptism requires water, applied by immersion or by pouring on the head, together with the words that name the three Persons of the one God. The Catechism gives the essential rite: the minister pours water over the candidate's head, or immerses, "saying: 'N., I baptize you in the name of the Father, and of the Son, and of the Holy Spirit'" (CCC 1240). The Church holds this so firmly that anyone at all, including an unbeliever, can baptise validly in an emergency provided they use water and that form and intend to do what the Church does (CCC 1256). No ordination is required, no building, no register. Remove the water or remove the form, and there is no baptism to recognise.

The Church applies that standard to itself as strictly as to anyone else. In 2020 the Congregation for the Doctrine of the Faith ruled that baptisms conferred by Catholic ministers who had altered the words to "We baptize you" were invalid, and a number of priests learned that their own baptisms had never taken place. The form is not a formality.

Why Most Protestant Baptisms Are Recognised

Because the requirement is water and the Trinitarian form, the Catholic Church recognises the baptisms of the great majority of Protestant and Orthodox communities without hesitation. A Lutheran, Anglican, Methodist, Presbyterian or Baptist baptism performed with water in the name of the Father, Son and Holy Spirit is a real baptism, and the person baptised is a Christian who stands in a real though imperfect communion with the Catholic Church (CCC 838). Baptism is described as "the sacramental bond of unity existing among all who through it are reborn" (CCC 1271). Serious disagreements about the papacy, the Eucharist and justification, which our comparison of Catholic and Protestant teaching works through one at a time, do not touch the validity of the sacrament.

The 2001 Ruling on Latter-day Saint Baptism

On 5 June 2001 the Congregation for the Doctrine of the Faith published its answer to a formal question about whether baptism conferred in The Church of Jesus Christ of Latter-day Saints is valid. The answer was one word: negative. The commentary published alongside it in L'Osservatore Romano, written by the theologian Luis Ladaria, set out the reasoning. The Latter-day Saint rite does say "in the name of the Father, and of the Son, and of the Holy Ghost", so on the surface the form is present. The commentary explained that in Latter-day Saint teaching those three names refer to three distinct beings who are one in purpose, with the Father possessing a body of flesh and bones, so the words do not invoke the God whom Christian baptism invokes. The words are the same; the referent is different.

The practical consequence is straightforward. Converts to the Catholic Church from bodies whose baptism is not recognised are baptised, and this counts as their first baptism rather than a repetition, because the Church judges that nothing happened the first time. Where a real doubt exists about what was said or whether water was used, the parish confers baptism conditionally. Bring your certificate, records, or whatever you can remember to the priest, since the decision belongs to the diocese and is made case by case. Our guide to what baptism is and does covers the sacrament itself in full.

5. The Church of Jesus Christ of Latter-day Saints

The Church of Jesus Christ of Latter-day Saints teaches that the Father, the Son and the Holy Ghost are three separate beings who are perfectly one in purpose, love and will, and it calls this unity the Godhead. Joseph Smith organised the church in 1830 in New York after publishing the Book of Mormon, which Latter-day Saints receive as scripture alongside the Bible, and they hold that the authority of the apostles was lost from the earth and restored to Smith by revelation.

What Latter-day Saints Teach About God

The first Article of Faith reads: "We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost." A revelation recorded in the Doctrine and Covenants states that "The Father has a body of flesh and bones as tangible as man's; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage of Spirit" (D&C 130:22). Latter-day Saints worship Jesus Christ as the Savior and Redeemer, believe he atoned for sin in Gethsemane and on the cross, and believe he was literally resurrected. Historic Latter-day Saint teaching, expressed in Lorenzo Snow's couplet that as man now is God once was and as God now is man may become, holds out the prospect of exaltation for the faithful. Church leaders have said in recent decades that little has been revealed about the first half of that couplet and have emphasised the second.

Why Members Object to Being Called Non-Christian

Latter-day Saints find the charge that they are not Christians both untrue and offensive, and their reasons deserve to be heard. The name of Christ is in the name of the church. They pray to the Father in Jesus' name, take a weekly sacrament in memory of his body and blood, read the New Testament, send tens of thousands of missionaries to preach him, and organise their family life around him. Judged by devotion to Jesus, the case is a strong one. The Catholic position turns on a narrower question: whether the Jesus confessed is the one who is homoousios with the Father, one God with him rather than one being among several exalted beings.

The Catholic response addresses the doctrine and leaves the person alone. Latter-day Saint scripture describes the Father, the Son and the Holy Ghost as three distinct beings united in purpose, which is a different account of God from the one confessed at Nicaea, and the difference is large enough to reach the baptismal form, as the 2001 ruling concluded. Sincerity and holiness are separate questions, and nothing here is a judgment on either. Our full guide to Latter-day Saint beliefs and history covers the Book of Mormon, the temple, the priesthood offices, the family theology and the Catholic response in detail.

Source: membership figures are the church's own. The Church of Jesus Christ of Latter-day Saints reports more than 17 million members on its rolls worldwide in its annual statistical report. Self-reported rolls include members who no longer attend, and survey-based counts of self-identified Latter-day Saints, such as those published by the Pew Research Center, are lower.

6. Jehovah's Witnesses

Jehovah's Witnesses teach that Jehovah alone is Almighty God, that Jesus Christ is God's first and only direct creation and is identified with the archangel Michael, and that the holy spirit is God's impersonal active force rather than a Person. The movement grew from the Bible Student groups gathered by Charles Taze Russell in Pennsylvania in the 1870s, and it took the name Jehovah's witnesses in 1931 under Russell's successor Joseph Franklin Rutherford. Doctrine is settled by the Governing Body at the Watch Tower Bible and Tract Society's headquarters and published in The Watchtower.

What Witnesses Teach

Witnesses hold that God's name is Jehovah and that using it matters, that Christ's kingdom began ruling from heaven in 1914 after the end of the Gentile times, that 144,000 anointed Christians will reign with Christ in heaven while a great crowd of the faithful will live for ever on a restored paradise earth, and that the wicked are annihilated rather than eternally tormented. They reject the immortality of the soul, the cross as a symbol (holding that Jesus died on an upright stake), the celebration of Christmas, Easter and birthdays, and blood transfusion, which they read as forbidden by Acts 15:29. They refuse military service and political involvement, and they have been persecuted and imprisoned in many countries for that refusal. Their Bible is the New World Translation, produced by the Society.

The Catholic Response

The Witness case against the Trinity is that the word is absent from Scripture, that Jesus repeatedly speaks of the Father as greater than himself (John 14:28), and that he prays to the Father, which a person cannot do to himself. Catholic theology answers that the New Testament speaks of Christ in two registers, as God from eternity and as the man who assumed a real human nature and a real human will, and that the sayings about the Father's greatness belong to the second. Philippians 2:6-8 makes the pattern explicit: the one who was in the form of God emptied himself and took the form of a servant. The passages in section 3 above stand unanswered on the Witness reading, above all Thomas addressing Jesus as "my God" without correction.

Witness baptism is by full immersion following a public profession made by answering questions before the congregation, and the rite does not confer baptism in the Trinitarian form. Catholic pastoral practice is accordingly to baptise former Witnesses who enter the Church. Our full guide to Jehovah's Witness beliefs, history and practice covers the 1914 teaching, the New World Translation, disfellowshipping and the blood question in depth.

Source: the Watch Tower Bible and Tract Society's own annual service year report counts more than eight million active publishers worldwide, a figure that counts those who report time in the preaching work rather than everyone who attends. Attendance at the annual Memorial is reported as substantially higher.

7. Oneness (Apostolic) Pentecostals

Oneness Pentecostals confess that God is one indivisible Person who has revealed himself in three ways: as Father in creation, as Son in redemption, and as Holy Spirit in the believer, and they hold that Jesus is the name of that one God. They prefer the term Apostolic to describe themselves, and the largest bodies are the United Pentecostal Church International and the Pentecostal Assemblies of the World. They are the one group on this page that arose from within a Trinitarian movement in living memory.

How the Division Happened

The split traces to a camp meeting at Arroyo Seco, California, in 1913, where a preacher observed that every baptism recorded in the Book of Acts is administered in the name of Jesus rather than with the words of Matthew 28:19. The observation spread rapidly through early Pentecostalism as the "New Issue", ministers were rebaptised in Jesus' name, and in 1916 the Assemblies of God adopted a Trinitarian Statement of Fundamental Truths, after which a large minority of its ministers left or were excluded. Oneness bodies have formed a distinct family within Pentecostalism ever since.

What They Hold, Stated Fairly

Oneness believers affirm the full and unqualified deity of Jesus Christ, and they regard themselves as defending it against a Trinitarianism they think dilutes it. They reject Arianism completely. For them Jesus is the one God of Israel present in the flesh, fully divine in his own right, and they read Colossians 2:9 and Isaiah 9:6 in that light. They insist that they affirm the reality of the incarnation, holding that the Son is genuinely and fully human, and that the human Son prays to the Father who is Spirit. Most teach the "new birth" as repentance, baptism in the name of Jesus Christ, and the baptism of the Holy Spirit evidenced by speaking in tongues, and many hold all three necessary for salvation. Many congregations also teach distinctive standards of dress and appearance.

Catholic teaching identifies the Oneness position as a modern form of modalism, the view associated with Sabellius in the third century and rejected by the Church then. Oneness writers themselves reject the label, and they object in particular to the charge that they teach three successive phases, since they hold that God was Father in heaven while the Son walked in Galilee. The Catholic difficulty stands where CCC 254 puts it: Father, Son and Spirit are described as ways in which one Person is revealed, and Nicene faith confesses three who are "really distinct from one another". The decisive difficulty is relational: Jesus prays to the Father, is sent by the Father, speaks of the Father's love for him before the foundation of the world (John 17:24), and promises to send another Advocate (John 14:16). A modal reading has to make those exchanges internal to one Person.

The Trinitarian formula of Matthew 28:19 stands as the Lord's own baptismal command, and Acts records the shorthand by which the apostolic baptisms were distinguished from the baptism of John. Because Oneness baptism is administered in the name of Jesus alone, the Trinitarian form is absent and the Catholic Church does not recognise it. Our guide to Oneness Pentecostalism and the Jesus name baptismal formula covers the movement, its main bodies and the baptismal question in full.

8. The Christadelphians

The Christadelphians teach that God is one Person, the Father, that Jesus is his literal Son who began to exist when he was born of Mary, and that the holy spirit is God's power in action rather than a Person. The community was gathered by John Thomas, an English-born physician who broke with the Restoration movement in the United States in the 1840s, and the name, Greek for "brothers in Christ", was adopted in 1864 so that members could register as conscientious objectors during the American Civil War.

What Christadelphians Hold

Their doctrine is set out in the Birmingham Amended Statement of Faith and is unusually coherent for a small body. Jesus is fully human, of Adam's nature, who lived a sinless life, died as a sacrifice, was raised bodily and is now immortal at God's right hand, and he did not exist as a person before his conception. Human beings have no immortal soul: the dead are unconscious until the resurrection, when the responsible are raised for judgment, the accepted receive immortality, and the rejected cease to exist. There is no eternal torment. There is no personal devil either, since Christadelphians read the biblical language of "the devil" and "satan" as personifications of sin and of human nature turned against God. They expect Christ to return bodily to establish the Kingdom of God on earth centred on a restored Israel with Jerusalem as its capital.

Christadelphians have no paid clergy, no bishops and no central authority. Congregations are called ecclesias, they are governed by their own members, and baptism is by full immersion of adults after instruction, on profession of the community's doctrines. They are conscientious objectors and refrain from voting and from military and police service. They read the Bible daily on a shared plan, and their level of scriptural literacy is high.

The Catholic response follows the pattern of the earlier sections and turns on the same texts. A Christ who began to exist at Bethlehem cannot be the Word who was with God in the beginning and through whom all things were made (John 1:1-3), cannot have shared the Father's glory "before the world existed" (John 17:5), and cannot be the one Thomas addressed as "my God". On the personhood of the Spirit, the actions ascribed to him in Scripture, teaching, choosing, forbidding and grieving, describe someone rather than something.

Source: the Christadelphian community publishes no central membership register, since it has no central authority. Ecclesial directories maintained by Christadelphian publishing houses list a worldwide membership in the tens of thousands, concentrated in Britain, Australia, North America and parts of East Africa.

9. The Church of Christ, Scientist

Christian Science teaches that God is divine Principle, Mind, Spirit, Soul, Life, Truth and Love, and that Life, Truth and Love together constitute the triune nature of God, a reading that replaces the three Persons with three qualities. Mary Baker Eddy set out the system in Science and Health with Key to the Scriptures, first published in 1875, and chartered the church in Boston in 1879. The Mother Church, The First Church of Christ, Scientist, remains in Boston, and the church publishes the Christian Science Monitor.

What Christian Scientists Hold

The distinctive teaching is metaphysical. God is wholly good and wholly Spirit, and matter, evil, sin, sickness and death have no ultimate reality: they are errors of what Eddy called mortal mind, and they dissolve as a person comes to understand the allness of God. Healing follows from that understanding, which is why Christian Scientists have historically relied on prayer, often assisted by a practitioner listed in The Christian Science Journal, in place of medical treatment. The church states that the choice of treatment belongs to the individual and that no member is forbidden to consult a doctor. Eddy distinguished Jesus, the human man, from "the Christ", the divine idea of sonship which Jesus embodied more fully than anyone, so in her system Jesus is the Way-shower who demonstrated a healing power open to everyone. Sin is an error to be corrected instead of a debt to be atoned for, and the crucifixion and resurrection are read as the final demonstration of the powerlessness of matter.

Christian Science services are conducted by lay Readers who read from the Bible and from Science and Health with no preaching. The church does not administer water baptism or a communion of bread and wine at all: baptism is understood as purification of thought and communion as spiritual union with God, and the question of validity therefore does not arise in the way it does for the other bodies here. A convert from Christian Science to the Catholic Church is baptised because no baptism has taken place.

The Catholic response engages the metaphysics first. Christian teaching holds that God created matter and called it good (Genesis 1:31), that the Word "became flesh" (John 1:14), and that the resurrection was of a body that could be touched and that ate (Luke 24:39-43). A faith whose centre is the incarnation of God in a physical body cannot treat matter as an illusion. Christian Science also raises a pastoral question, since the reliance on prayer in place of treatment has real consequences for the sick and for children. Catholic teaching holds prayer for healing and the use of medicine as complementary goods, and the Church has run hospitals for sixteen centuries on that basis.

Source: The Church of Christ, Scientist declines to publish membership figures, a policy set in Eddy's Manual of The Mother Church, which forbids the numbering of the church's members. The number of branch churches and of practitioners listed in The Christian Science Journal, which is public, has declined sharply since the middle of the twentieth century.

10. Unitarians and Unitarian Universalists

Unitarianism is the historic position that God is one Person, the Father, and that Jesus was a man uniquely commissioned by God rather than God incarnate, and Universalism is the historic position that God will eventually save everyone. The two American bodies holding those views merged in 1961 to form the Unitarian Universalist Association, which today asks no doctrinal profession of its members at all. The modern association is the furthest from Nicaea of any body on this page, and it is the one least interested in the distance.

The Historic Unitarians

Anti-Trinitarian movements appeared early in the Reformation. Michael Servetus was burned in Geneva in 1553 for denying the Trinity, with Calvin's approval, a death that later became a standing argument for religious toleration. Faustus Socinus organised the Polish Brethren, whose Racovian Catechism of 1605 argued the case from Scripture. In Transylvania, Francis David won the protection of the Edict of Torda in 1568, one of the earliest legal guarantees of religious freedom in Europe, and the Hungarian Unitarian Church there survives to this day. In England and America the tradition ran through Joseph Priestley, the scientist who discovered oxygen, and William Ellery Channing, whose 1819 sermon in Baltimore made the Unitarian case a public one. These were serious biblical scholars who argued their position from the text, and they should be met with argument rather than dismissal.

The Modern Association

The Unitarian Universalist Association is non-creedal and covenantal: congregations agree on how they will treat one another rather than on what they will believe. Its stated sources include Jewish and Christian teachings alongside humanist reason, earth-centred traditions and the wisdom of the world religions, and its congregations contain theists, humanists, agnostics and atheists together. Many congregations do not describe themselves as Christian, and the association does not present itself as a Christian denomination. Some ministers perform child dedications, some perform baptisms with water and the Trinitarian words, and because there is no common doctrine a Catholic parish assessing such a baptism has to establish what was actually said and done in that particular case.

The Catholic response to the historic Unitarian argument returns to section 3: the divine titles, the worship offered to Christ and the baptismal formula have to be accounted for, and a purely human Jesus accounts for none of them. On universalism, the Catholic Church holds that God "wants all people to be saved" (1 Timothy 2:4) and that we may hope and pray for the salvation of all, while teaching that human freedom is real and that a definitive refusal of God is possible, which our guides to the doctrine of hell and free will and grace set out.

Source: the Unitarian Universalist Association's own reporting lists roughly a thousand member congregations in the United States and certified adult membership well under two hundred thousand.

11. The Iglesia ni Cristo

The Iglesia ni Cristo, Tagalog for Church of Christ, teaches that the Father alone is God, that Jesus Christ is a man, the highest of God's creatures, sent as Saviour and mediator but not divine, and that the Holy Spirit is God's power. Felix Manalo registered the church in the Philippines on 27 July 1914, and its administration is based in Quezon City, with a distinctive architecture of spired chapels recognisable across the country.

What the Iglesia ni Cristo Teaches

The church holds that after the death of the apostles the true Church fell into apostasy and disappeared from the earth, and that it was restored in the Philippines in the last days through Felix Manalo, whom the church identifies as God's messenger for this age. Salvation is taught to be found within the membership of the church, and membership carries real obligations: attendance at twice-weekly worship, offerings, doctrinal instruction before baptism, and marriage within the faith. Leadership passed from Felix Manalo to his son Eraño and then to Eduardo Manalo as Executive Minister. The church directs its members to vote as a bloc in Philippine elections, which gives it a political weight beyond its numbers.

The Catholic response deals with two claims. On the doctrine of God, the church's denial of the divinity of Christ meets the same body of Scripture set out in section 3, and its members are typically well drilled in the counter-texts, so a conversation with an Iglesia ni Cristo neighbour rewards preparation more than most. On the total apostasy claim, the Catholic answer is that Christ promised the gates of hell would not prevail against his Church (Matthew 16:18) and that he would be with his disciples "always, to the very end of the age" (Matthew 28:20), which is difficult to reconcile with an eighteen-century disappearance. The historical record of Christian teaching from the second century onwards is continuous, public and abundant, and it does not describe the doctrine the Iglesia ni Cristo restored. On baptism, because the church denies that Christ is God, any use of the three names carries a meaning other than the Christian one, and converts to the Catholic Church are baptised.

Source: the Philippine Statistics Authority's 2020 Census of Population and Housing records the Iglesia ni Cristo as the third largest religious affiliation in the Philippines, after Roman Catholics and Muslims.

12. La Luz del Mundo

La Luz del Mundo, Spanish for The Light of the World, teaches a Oneness doctrine of God, baptises in the name of Jesus Christ alone, and holds that its leader is the Apostle of Jesus Christ for the present age. Eusebio Joaquin Gonzalez founded the church in Guadalajara, Mexico, in 1926, taking the name Aaron, and leadership has since passed within his family, to Samuel Joaquin Flores and then to Naason Joaquin Garcia.

What the Church Teaches

The church holds that Christianity fell into apostasy after the apostolic age and that the primitive church was restored through its founder, so its members regard it as the one true church and its apostle as the appointed guide to salvation. Its doctrine of God resembles that of the Oneness Pentecostals covered in section 7 above: God is one Person, Jesus Christ is that one God made flesh, and baptism is administered in the name of Jesus Christ, which places the church outside the Trinitarian form required for a valid baptism. Worship is austere and unadorned, members observe strict standards of dress and conduct, and the annual Holy Supper gathering in Guadalajara draws members from across the Americas.

This page assesses doctrine, and questions of governance, leadership and conduct belong elsewhere. Our profile of La Luz del Mundo, its founding and its leadership covers that history and the legal proceedings involving its current leader. For the doctrinal question that concerns us here, the same answer applies as to the Oneness churches: Matthew 28:19 gives the Lord's own baptismal command naming three Persons, and the New Testament's account of the Father sending the Son and the Son sending the Spirit cannot be reduced to one Person acting in three modes.

Source: the church states a worldwide membership in the millions. Mexico's national census, conducted by INEGI, records a substantially smaller number of adherents in the church's home country, and the two figures have never been reconciled publicly.

13. The Bodies Compared

The table below sets the eight bodies side by side on the four questions that matter for this page: when they began, what they teach about God, what they teach about Jesus, and whether their baptism is recognised as valid by the Catholic Church. Each entry is summarised from the body's own doctrinal statements.

Positions are summarised from each body's own doctrinal documents: the Articles of Faith and Doctrine and Covenants, Watch Tower publications including What Does the Bible Really Teach?, the United Pentecostal Church International's Articles of Faith, the Birmingham Amended Statement of Faith, Science and Health with Key to the Scriptures, the Unitarian Universalist Association's bylaws and stated sources, and the published teaching of the Iglesia ni Cristo and La Luz del Mundo. The baptismal column reflects the Catholic norm of water and the Trinitarian form (CCC 1240) and, for the Latter-day Saints, the 2001 response of the Congregation for the Doctrine of the Faith.

Two things stand out from the table. The first is how little these bodies agree with one another. A Christadelphian and a Oneness Pentecostal hold opposite errors: one makes Christ purely human, the other collapses the three Persons into one. Grouping them together describes what each of them denies rather than anything they share. The second is that the Catholic judgment about baptism follows a single rule applied evenly, and it is the same rule that invalidated the baptisms of Catholic priests who improvised the words in 2020. Our wider map of the Christian denominations and their families places the Trinitarian bodies in relation to one another.

14. Talking With a Nontrinitarian Neighbour

A conversation about the Trinity with a Witness at the door or a Latter-day Saint colleague goes better when a few things are settled in advance. Six practical rules cover most of what is needed.

Know Your Own Doctrine First

Most Catholics who lose these conversations lose them because they cannot state the Trinity accurately. One God, three Persons, each fully God, distinguished only by their relations of origin: the Father unbegotten, the Son eternally begotten, the Spirit proceeding. Three whats is tritheism. One who is modalism. Both errors have names because the Church met them both and rejected them both. If you find yourself explaining the Trinity as water in three states, or as one man who is a father, a son and an employee, you have just taught modalism, and your Oneness neighbour will agree with you.

State Their Position Before You Answer It

Ask a Latter-day Saint what the Godhead means before telling him what he believes. Ask a Witness what the New World Translation does with John 1:1 rather than assuming. People give you a hearing after they see that you understood them, and misdescribing someone's faith to their face ends the exchange and deserves to.

Go to the Texts, Not the Word

Arguing about whether the word "Trinity" is in the Bible wastes an afternoon. Go instead to John 20:28, where Thomas addresses Jesus as "my Lord and my God" and Jesus accepts it. Go to Colossians 2:9, Hebrews 1:8, John 8:58, Acts 5:3-4 and Matthew 28:19. The doctrine is the summary of those texts, and the argument belongs on them.

Be Honest About What Is Hard

The Trinity is a mystery in the technical sense: a truth the mind can receive and cannot exhaust. Pretending to have solved it invites the demand that you demonstrate it, which no one can do. Saying that God's inner life exceeds what a creature can measure is honest and is also the Church's own position (CCC 234).

Keep Doctrine and Behaviour Apart

If someone is being controlled, frightened or cut off from their family, that is urgent and it needs the tests set out in our guide to the warning signs of a controlling religious group. If someone simply holds a different doctrine of God, they need an argument and a friendship, not a rescue. Confusing the two insults people who are doing nothing wrong and leaves people in real danger unhelped.

Answer the Baptism Question Plainly

If your neighbour is thinking about entering the Catholic Church, tell them the truth early: the parish will look at what water and what words were used, and in most of the cases on this page they will be baptised, once, as their first baptism. That is easier to hear at the beginning than at the end. Direct them to a priest, since the judgment belongs to the diocese, and let them read our guide to the sacrament of baptism in the meantime.

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