Common Oneness Arguments Against The Trinity

As a former Oneness Pentecostal, I still engage with the ideas I once held. I often come across social media posts attempting to prove the Oneness position or discredit the Trinity. Rather than frustrate me, these arguments push me deeper into Scripture and theology. They give me the opportunity to test what I believe—and more importantly, why I believe it.

In this post, I want to address some of the most common arguments I see from Oneness Pentecostals—arguments used to either promote Modalism or attack Trinitarian theology.

The Church History Argument

Before diving into Scripture, let’s talk about church history. A frequent Oneness claim is that the earliest Christians were Oneness believers, and that Trinitarian doctrine emerged later through the influence of Greek philosophy.

Take this quote from Thomas Weisser, a prominent Oneness writer:

“In the Church the trend of the majority, after the first two or three centuries, was that of going outside of the Bible for ultimate authority… Humanism bullied its way into the Church. Men blindly accepted the dictates of man when they conformed to the decisions of Church Councils.”

— After the Way Called Heresy: A Time of Oneness Believer

This is a bold claim. And when you make bold claims, the burden of proof is on you to back them up. But here’s where I find a double standard.

Many Oneness teachers claim the Trinity was a late development (2nd–3rd century), yet the earliest known advocates of Modalism—Praxeas of Rome and Noetus of Smyrna—also appear in that exact same time period. If the Trinity is to be rejected because it appears “late,” shouldn’t that also apply to Modalism?

Here’s another example of this inconsistency, from Larry Tate:

“The teachings of the Trinity originated with the Roman Catholic Church via the Nicene Creed… On the other hand, Oneness theology was taught by the early church until a corrupt and apostate Christendom eventually repressed the teaching and misplaced, or deliberately destroyed the documentation…”

So let me get this straight: the reason we can’t find early documentation for Oneness teaching is because it was all destroyed? That’s not a theological argument. That’s a conspiracy theory. You’re not building a case from evidence—you’re assuming a conclusion and blaming the lack of proof on a cover-up.

With that in mind, let’s walk through several commonly used Scriptures that Oneness believers point to—and examine whether they actually support their view.

1. Colossians 2:9 (KJV)

“For in him dwelleth all the fulness of the Godhead bodily.”

Oneness advocates often quote this and say, “Jesus isn’t in the Godhead; the Godhead is in Jesus.” They argue that since the Godhead refers to the Father, Son, and Spirit, and all the fullness of the Godhead dwells in Christ, then Jesus must be the Father, Son, and Holy Spirit.

But that’s not what Paul is saying.

First, the word “Godhead” is archaic. The Greek word here is theotēs, which simply means “deity” or “divine nature.” Most modern translations reflect this:

• ESV: “For in him the whole fullness of deity dwells bodily.”

• CSB: “For the entire fullness of God’s nature dwells bodily in Christ.”

Paul isn’t teaching that Jesus contains all three persons of the Trinity. He’s affirming that Jesus is truly and fully God—not partly God or a piece of God. This is consistent with Trinitarian doctrine. Each person of the Trinity is fully God. That’s not partialism; it’s orthodoxy.

2. John 10:30 (KJV)

“I and my Father are one.”

David Bernard writes, “Jesus is one with the Father in the sense that He is the Father.”

But does the grammar support that claim?

Not at all. The Greek reads: Ego kai ho Pater hen esmen — “I and the Father are one.” The verb esmen (“are”) is plural. Jesus isn’t saying, “I am the Father.” He’s saying, “We are one.” The plural verb demonstrates distinction between the two.

Even early Church Fathers addressed this. Tertullian wrote:

“There is in this passage an intimation of two beings—‘I and my Father’—and a plural predicate, ‘are’… They argue that Jesus claims to be His own Father.”

Hippolytus similarly noted:

“He did not say, ‘I and my Father am one,’ but ‘are one.’ The word ‘are’ is not said of one person, but refers to two persons.”

So what does Jesus mean? He’s not claiming to be the same person as the Father, but that He shares the same divine essence.

3. John 14:8–9 (KJV)

“He that hath seen me hath seen the Father.”

Oneness theology sees this as a mic drop: Jesus is the Father.

But notice what Jesus doesn’t say. He doesn’t say, “I am the Father.” He says, “If you’ve seen me, you’ve seen the Father.”

John 1:18 helps clarify this:

“No one has ever seen God. The one and only Son, who is himself God and is at the Father’s side—he has revealed him.”

Jesus reveals the invisible Father because He is the exact representation of God’s being (Heb. 1:3). That doesn’t mean He is the Father.

In fact, keep reading in John 14:

“I am in the Father, and the Father is in me… I will ask the Father, and he will give you another Helper.” (vv.10, 16)

The Son is not the Father, and the Spirit is not the Son. But they are united in divine essence and mission.

4. John 5:43 (KJV)

“I am come in my Father’s name…”

Oneness teachers claim this means the Father’s name is “Jesus,” and the Son inherited that name.

But the phrase “in my Father’s name” refers to authority. In Greek, onoma (“name”) often denotes power or representation.

We see this in 1 Samuel 17:45:

“I come to you in the name of the Lord of hosts…”

David wasn’t saying he was Yahweh. He was saying he came on Yahweh’s behalf.

In John 5, Jesus is doing the same—acting in the Father’s authority. The Son inherits a more excellent name—but Hebrews 1:4–5 makes clear that the name is “Son,” not “Jesus.”

5. 1 Timothy 3:16 (KJV)

“God was manifest in the flesh…”

To Oneness believers, “God” here means “the Father.” Therefore, the Father was manifest in the flesh.

But that’s not how Trinitarians read it. Yes, Jesus is God incarnate—but that doesn’t mean the Father became flesh.

The New Testament never says the Father was born, suffered, died, or rose again. Those are acts of the Son. To claim otherwise is to confuse the persons of the Trinity.

6. 1 Corinthians 8:6 (KJV)

“But to us there is but one God, the Father…”

Oneness theology often quotes only this portion to claim only the Father is God. But read the whole verse:

“…and one Lord Jesus Christ, through whom are all things and through whom we exist.”

If we say “only the Father is God” based on the first half, we’d also have to say “only Jesus is Lord” based on the second. That’s not how Paul is using the terms. In fact, he’s echoing the Shema (Deut. 6:4) and applying it to both the Father and the Son.

Theos (God) and kurios (Lord) were interchangeable divine titles in Paul’s theology. Trinitarians affirm one God, revealed in the persons of the Father and the Son.

7. John 1:1 (KJV)

“In the beginning was the Word, and the Word was with God, and the Word was God.”

Oneness writers often argue that “the Word” here refers to God’s plan or thought, not a distinct person.

But that doesn’t hold up to the grammar or context.

The phrase ho Logos ēn pros ton Theon (“the Word was with God”) uses pros, a preposition that implies intimate relationship between two distinct persons. It’s not the language of a thought or idea, but of personal fellowship.

Church Fathers understood this:

• Clement of Alexandria: “The Word, that is, the Son of God… is eternal and uncreated.”

• Hippolytus: “There are two Persons… and then the third, the Holy Spirit.”

• John Calvin: “It would be absurd to say the Speech was always with God, if He had not a distinct substance.”

John 1:14 makes it explicit:

“The Word became flesh… the glory of the one and only Son, who came from the Father.”

Again, the Son is not the Father—but He is God.

Conclusion: The Real Issue with Oneness Theology

At the end of the day, Oneness theology doesn’t just blur the lines between the persons of the Trinity—it erases them. As Edward Dalcour writes:

“Oneness Christology removes the personhood and deity from the Son… In Oneness theology, only the Father is God. The Son is merely a man.”

This may not be immediately obvious to those in the movement (it wasn’t to me when I was Oneness), but it’s built into the system.

As Steven Gill (a Oneness theologian) admits:

“The revelation of the Son of God is made clear. He is a submitted man.”

But that’s not what Scripture teaches. Jesus is more than a submitted man. He is the eternal Son, co-equal and co-eternal with the Father and Spirit.

The Trinity isn’t a philosophical invention. It’s the faithful summary of what Scripture reveals:

• One God.

• Three persons.

• Equal in glory.

• Distinct in role.

• United in essence.

That’s not confusion. That’s Christianity.