"If the Father is God, the Son is God, and the Spirit is God, that's three gods, whatever you call it." Oneness Pentecostals raise this objection sincerely, because they hold firmly that God is one.
Short answer: No. Christians confess one God, not three. "Person" does not mean a separate being: the Father, Son, and Holy Spirit are one divine nature, distinct only in how they relate to one another. Modalism rightly guards God's oneness, but it erases distinctions that Scripture places in God before the Incarnation.
Key verses on the Trinity and modalism
- "Hear, O Israel! The LORD is our God, the LORD alone!" (Deuteronomy 6:4)
- "In the beginning was the Word, and the Word was with God, and the Word was God." (John 1:1)
- "Now glorify me, Father, with you, with the glory that I had with you before the world began." (John 17:5)
- "I testify on my behalf and so does the Father who sent me." (John 8:18)
- "he will give you another Advocate" (John 14:16)
Scripture quotations are from the New American Bible, Revised Edition (NABRE), © 2010, 1991, 1986, 1970 Confraternity of Christian Doctrine, Washington, D.C. Used by permission. All rights reserved.
What Catholics Actually Teach
First, the Oneness view in its own words. The United Pentecostal Church International (UPCI), the largest Oneness body, teaches: "There is one God, who has revealed Himself as Father; through His Son, in redemption; and as the Holy Spirit, by emanation. Jesus Christ is God manifested in flesh" (UPCI, Our Beliefs). A UPCI position paper explains "Father" and "Son" as the difference between Jesus' deity and His humanity, and warns: "Any attempt to identify two persons from these two titles falls into either the error of ditheism or the error of subordinationism" (The True Humanity of Jesus Christ).
The Catholic Church agrees that God is one: "The Trinity is One. We do not confess three Gods, but one God in three persons" (CCC 253). The persons "do not share the one divinity among themselves but each of them is God whole and entire" (CCC 253).
Yet they are not one person with three titles. "'Father', 'Son', 'Holy Spirit' are not simply names designating modalities of the divine being, for they are really distinct from one another" (CCC 254). They differ only in their relations: "It is the Father who generates, the Son who is begotten, and the Holy Spirit who proceeds" (CCC 254).
What Catholics do not teach:
- Three gods or three beings. That is tritheism, and the Church rejects it (CCC 253).
- That each person is one-third of God. Each is "God whole and entire."
- That the persons act separately. "Inseparable in what they are, the divine persons are also inseparable in what they do" (CCC 267).
The Biblical Case
1. God is one, and both sides agree
"I am the first, I am the last; there is no God but me" (Isaiah 44:6). St. Paul agrees: "there is no God but one" (1 Corinthians 8:4). The Trinity keeps every word of this.
2. The Word was "with God" before anything was made
St. John says "the Word was with God, and the Word was God," then repeats, "He was in the beginning with God" (John 1:1–2). "With" takes two. Through the Son, God "created the universe" (Hebrews 1:2). This is before Bethlehem. A distinction between Jesus' deity and His humanity cannot explain it, because His humanity did not yet exist.
3. The Son shared glory and love with the Father before creation
Jesus prays: "Now glorify me, Father, with you, with the glory that I had with you before the world began" (John 17:5). And: "you loved me before the foundation of the world" (John 17:24). Glory shared "with you," love given and received: that is the language of persons in relation. God "is eternally Father by his relationship to his only Son" (CCC 240).
4. Jesus counts Himself and the Father as two witnesses
"Even in your law it is written that the testimony of two men can be verified. I testify on my behalf and so does the Father who sent me" (John 8:17–18). If the Father were only the deity within Jesus, there would be one witness, and Jesus' argument would fail.
5. The Father sends the Son, and the Spirit is "another"
"God sent his Son, born of a woman" (Galatians 4:4): the Son is sent, then born. "I came from the Father and have come into the world. Now I am leaving the world and going back to the Father" (John 16:28). And "I will ask the Father, and he will give you another Advocate" (John 14:16): the Son asks, the Father gives, the Spirit is sent. At Jesus' baptism, He "saw the Spirit of God descending like a dove," and a voice said, "This is my beloved Son" (Matthew 3:16–17). On why baptism names all three, see Must You Be Baptized "in Jesus' Name Only"?
Objections Answered
(a) "Three persons who are each fully God add up to three gods."
At its strongest: St. Peter, St. James, and St. John share one human nature, yet they are three men. By the same logic, three divine persons sharing one nature are three gods. Hence the UPCI's warning that two persons called "Father" and "Son" would mean "ditheism" (two gods) or a lesser Son.
Answer: The argument is ancient, and the Church answered it. St. Gregory of Nyssa took it up in On "Not Three Gods." Three men are three because each acts on his own. "But in the case of the Divine nature we do not similarly learn that the Father does anything by Himself in which the Son does not work conjointly" (newadvent.org). The divine persons do not each hold a piece of divinity. Each is the one divine nature, whole (CCC 253), and they act inseparably (CCC 267). Relation alone distinguishes them (CCC 255).
The same UPCI paper also admits "a distinction between the divine will and His human will" in Christ, and Catholics agree that Christ has two wills (CCC 475). So the question is not whether there is any distinction. It is whether Scripture places a Father–Son distinction in God before the Incarnation. John 1:1 and 17:5 say it does.
(b) "Isaiah calls the Son 'Father-Forever.'"
At its strongest: "For a child is born to us, a son is given to us... They name him Wonder-Counselor, God-Hero, Father-Forever, Prince of Peace" (Isaiah 9:5; 9:6 in many Bibles). The son is called "Father." So the Son is the Father.
Answer: Catholics gladly read this verse of the Messiah, who is truly "God-Hero." But these are throne names describing what the King is to His people. Isaiah uses "father" the same way for a royal steward: "He shall be a father to the inhabitants of Jerusalem" (Isaiah 22:21), in the very passage the NABRE note on 9:5 points to (22:22). Isaiah never says the child is the Father of the Son. In John 17, the Son speaks to the Father.
(c) "All the fullness of God dwells in Jesus. Nothing is left for other persons."
At its strongest: "For in him dwells the whole fullness of the deity bodily" (Colossians 2:9). Jesus said, "Whoever has seen me has seen the Father" (John 14:9). If all of God is in Jesus, the Father and the Spirit are simply Jesus.
Answer: Catholics affirm Colossians 2:9 completely: each person is "God whole and entire," so the whole divine nature is in the Son. The Church even teaches that "the Father is wholly in the Son" (CCC 255), echoing Jesus: "I am in the Father and the Father is in me" (John 14:10). But being in someone is not being that someone. The same letter gives thanks "to the Father," who "transferred us to the kingdom of his beloved Son," through whom "all things were created" (Colossians 1:12–16).
(d) "When Jesus prayed, His humanity was praying to His deity."
At its strongest: The UPCI paper holds that it is "more accurate to say simply that Christ prayed as an authentic human," and that the difference between deity and humanity "explains the biblical difference in the use of the titles 'Father' and 'Son.'" Jesus truly was a man who prayed, wept, and grew weary. So His prayers to the Father need no second divine person.
Answer: Catholics agree that Jesus prayed with a true human mind and will (CCC 475). But listen to what He prays: "Now glorify me, Father, with you, with the glory that I had with you before the world began" (John 17:5); "you loved me before the foundation of the world" (17:24). A humanity conceived in Mary's womb had no glory "before the world began." The one praying is the eternal Son. St. Paul says the same: "though he was in the form of God," He "emptied himself, taking the form of a slave" (Philippians 2:6–7). The one who took the flesh existed before the flesh. And "God sent his Son, born of a woman" (Galatians 4:4): the Son is sent first, then born. If "Son" meant only the humanity, God would have sent a humanity that did not yet exist.
The Church answers that Christ's human nature "belongs, as his own, to the divine person of the Son of God, who assumed it" (CCC 470). This exact reading was met in the early third century. Tertullian reports that Praxeas' followers "distinguish two, Father and Son, understanding the Son to be flesh, that is man, that is Jesus; and the Father to be spirit, that is God, that is Christ." He replied that "the flesh is not God, so that it could not have been said concerning it, 'That Holy Thing shall be called the Son of God,' but only that Divine Being who was born in the flesh" (Against Praxeas 27). The Son is not the flesh. The Son took flesh.
The Early Church Agrees
Scripture makes the case; the earliest Christians show it was read this way from the start, long before Nicaea.
- St. Justin Martyr (Dialogue with Trypho 128, mid-second century) rejected the view of those who "maintain that this power is indivisible and inseparable from the Father," like sunlight from the sun. The Word, he said, "is indeed something numerically distinct" (newadvent.org).
- Tertullian (Against Praxeas 25, early third century), on John 10:30: "These Three are one essence, not one Person, as it is said, 'I and my Father are One,' in respect of unity of substance not singularity of number" (ccel.org). One God, without three gods and without one person in three masks. (Tertullian wrote this after joining the Montanists, but on the Trinity he defended the faith the Church already held.)
- St. Hippolytus (Against Noetus 7 and 14, early third century), on John 10:30: "He did not say, 'I and the Father am one, but are one.' For the word are is not said of one person, but it refers to two persons, and one power." And on John 1:1: "Would one say that he speaks of two Gods? I shall not indeed speak of two Gods, but of one; of two Persons however" (newadvent.org).
- Pope St. Dionysius (letter of about AD 260, quoted by St. Athanasius) rejected both errors at once. Sabellius "blasphemously says that the Son is the Father, and the Father the Son," while others "in some sort preach three Gods." Christ's true disciples, he wrote, "know well that a Triad is preached by divine Scripture, but that neither Old Testament nor New preaches three Gods" (De Decretis 26).
Conclusion
Oneness believers are right to guard God's oneness and to confess that Jesus is truly God. Catholics confess both. The disagreement is whether Father, Son, and Spirit are three real persons or three titles of one. Scripture shows the Son "with God" before creation, sharing the Father's glory before the world began, and the Church's earliest teachers read those verses exactly that way.
If you are a Oneness Pentecostal, read John 17 slowly and ask: to whom is Jesus speaking, and who shared His glory before the world began? For the wider case, see Is the Trinity in the Bible?
Come home. The faith that the Father, the Son, and the Holy Spirit are one God in three distinct persons is the faith the Catholic Church has confessed since the apostles, against both modalism and tritheism. Christ promised, "upon this rock I will build my church" (Matthew 16:18), and His Church never fell away or disappeared. It is the Catholic Church, governed by the successor of St. Peter and the bishops in communion with him. "It is through Christ's Catholic Church alone, which is the universal help toward salvation, that the fullness of the means of salvation can be obtained" (CCC 816). We invite you to come and see the Church Christ founded, and to enter her.
Your next step: Come to Mass this Sunday at your local Catholic church. You can find one near you at MassTimes.org. Everyone is welcome; if you're not yet Catholic, pray with us but don't receive Communion yet. When you're ready to become Catholic, call the parish office and ask about OCIA, the Order of Christian Initiation of Adults. They will walk you through every step. Read our guide: How Do I Become Catholic? Not ready yet? Get our free pocket guide below and keep learning.
FAQ
Is the Trinity "1 + 1 + 1 = 3"? No. God is one in substance and three in persons. The numbers count different things (CCC 252).
The Bible never calls God three "persons." Why use the word? The Church developed terms like "person" but "gave a new and unprecedented meaning to these terms" to express what Scripture teaches (CCC 251).
What is modalism? The view that Father, Son, and Spirit are not distinct persons but titles or manifestations of the one God.
Sources
Scripture (NABRE, bible.usccb.org): Deuteronomy 6:4; Isaiah 9:5; Isaiah 22:21–22; Isaiah 44:6; Matthew 3:16–17; Matthew 16:18; John 1:1–2; John 8:17–18; John 14:9–10, 16; John 16:28; John 17:5, 24; 1 Corinthians 8:4; Galatians 4:4; Philippians 2:6–7; Colossians 1:12–16; Colossians 2:9; Hebrews 1:2.
Catechism of the Catholic Church (vatican.va): 240, 251, 252, 253, 254, 255, 267; 470, 475; 816.
Church Fathers (newadvent.org; ccel.org): Justin Martyr, Dialogue with Trypho 128 (ANF vol. 1); Tertullian, Against Praxeas 25 and 27 (ANF vol. 3); Hippolytus, Against Noetus 7, 14 (ANF vol. 5); Athanasius, De Decretis 26, quoting Dionysius of Rome (NPNF2 vol. 4); Gregory of Nyssa, On "Not Three Gods" (NPNF2 vol. 5).
United Pentecostal Church International (upci.org): "Our Beliefs"; The True Humanity of Jesus Christ, position paper adopted by the General Board in 2004 (PDF).