The Doctrine of God: The Trinity - Three Persons in One God (Part 2)

The baptism of Jesus showing all three persons of the Trinity simultaneously present at the Jordan River

In Part 1 of this series on the Doctrine of God, we examined who God is, His names, His nature and the major dimensions of His character. We established that God is simultaneously King, Judge, Father, Shepherd, Lawgiver and Redeemer, and that knowing Him accurately in His fullness is the foundation of genuine Christian life.

In this second part, we turn to the question that has generated more theological controversy, more church splits and more accusations of heresy across the history of Christianity than almost any other: the Trinity. Is God one Being in three distinct persons? Or is the Trinity a human invention imposed on a simpler biblical reality?

This is not an abstract question with no practical consequences. How you understand the nature of God determines how you relate to Him. A wrong theology of the Trinity does not just produce doctrinal error on paper. It produces a distorted prayer life, a distorted understanding of salvation and a distorted relationship with the Holy Spirit. The stakes are not merely academic. They are deeply personal.

So let us go back to the text. Carefully. Honestly. Without flinching from the difficult questions.

What the Trinity Actually Claims

Before examining the biblical evidence, we need to state clearly what the doctrine of the Trinity actually claims. Because much of the opposition to it is opposition to a misrepresentation rather than to the actual doctrine.

The doctrine of the Trinity does not claim that God is three separate Gods. That would be tritheism and no Trinitarian theologian has ever taught it. It does not claim that the Father, Son and Holy Spirit are three names for the same person appearing in different modes at different times. That is modalism, a very different position that Trinitarian theology has consistently rejected as heresy.

What the doctrine of the Trinity actually claims is this: there is one God who exists eternally as three distinct persons, the Father, the Son and the Holy Spirit. Each person is fully and completely God. Each person is distinct from the other two. And yet there is only one God, not three. One divine being, one divine nature, three distinct personal expressions of that one nature.

This is admittedly a concept that stretches the limits of human language and human comprehension. It should. We are talking about the nature of an infinite God. The fact that the Trinity is difficult to fully comprehend is not evidence against it. It is evidence that we are dealing with a Being whose nature exceeds the categories that finite human minds use to organise their experience of reality.


One God. Three distinct persons. Each fully God. None of the three a separate God. This is what the Trinity claims. And this is what the full biblical text teaches.


The Biblical Evidence for the Trinity

Evidence 1: The Plural Elohim in Genesis 1:26

The very first chapter of the very first book of the Bible contains a hint at the Trinitarian nature of God that is easy to miss if you are reading in English but impossible to miss if you are reading in Hebrew.

Genesis 1:1 opens with: In the beginning God created the heaven and the earth. The Hebrew word translated God here is Elohim (אֱלֹהִים), which is a plural noun. Not dual. Plural. Used throughout Genesis with singular verbs, indicating a singular subject acting, but described by a plural noun.

And then in Genesis 1:26, God speaks and the language shifts to something even more striking:

"And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth."  — Genesis 1:26 (KJV)

Let us make man in our image, after our likeness. Us. Our. Plural pronouns. God is not speaking to angels. Angels were not involved in the creation of humanity and do not share the divine image with God. God is not speaking with royal plurality, the so-called majestic plural, because this grammatical construct was not used in ancient Hebrew the way it sometimes was in later languages. God is speaking within Himself. There is a plurality within the divine being that is making a shared decision and taking a shared action.

This is not a fully developed Trinitarian statement. The Old Testament progressively reveals the nature of God rather than presenting the full picture all at once. But the plural Elohim with plural pronouns in Genesis 1 is a foundational hint that the divine being is not a single isolated monad but a being in whom genuine plurality exists alongside genuine unity.

Evidence 2: The Baptism of Jesus - All Three Persons Simultaneously Present

If the Elohim of Genesis is a hint, the baptism of Jesus in Matthew 3 is unmistakable. It is the clearest single event in the entire Bible where all three persons of the Trinity appear simultaneously, doing three distinct things at the same time, making their individual distinctness impossible to deny.

"And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased."  — Matthew 3:16-17 (KJV)

In one simultaneous moment: Jesus stands in the water, just baptised, coming up out of the Jordan River. The Spirit of God descends from above in the form of a dove and rests upon Him. A voice from heaven, the Father, speaks audibly and identifies Jesus as His beloved Son.

Three distinct persons. Three distinct actions. Three distinct locations in this single scene. The Son in the water. The Spirit descending from above. The Father speaking from heaven. If God were a single person appearing in three different modes, as modalism claims, then the Father could not speak from heaven while the Son stood in the water while the Spirit descended between them. All three are present and active at the same time. That is not one person in three modes. That is three distinct persons of one God.

No anti-Trinitarian interpretation of this passage has ever produced a satisfying explanation of how a single divine person manages to be in three different locations doing three different things simultaneously. The text simply does not allow it.

Evidence 3: The Great Commission - One Name, Three Persons

Matthew 28:19 is one of the most theologically compact statements about the Trinity in the entire New Testament:

"Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost."  — Matthew 28:19 (KJV)

Notice two things with precision. Jesus says baptise them in the name, singular, of the Father and of the Son and of the Holy Ghost. Not names, plural. Name. One name. One divine identity. But that one name belongs simultaneously to the Father, the Son and the Holy Spirit. Three persons sharing one divine name and one divine identity.

If the Father, Son and Holy Spirit were simply three titles for one person, you would expect Jesus to say baptise them in my name using all three of my titles. He does not say that. He distinguishes three persons while uniting them under one name. That is the Trinity in a single verse stated by Jesus Himself on the occasion of His final commission to His disciples.

Evidence 4: The Farewell Discourse - John 14 to 17

John chapters 14 through 17 represent Jesus's most extended and intimate theological teaching, delivered to His disciples on the night of the Last Supper. And throughout these four chapters, the distinction between Father, Son and Holy Spirit is not occasional or incidental. It is constant, consistent and unmistakable.

Jesus speaks of the Father as someone distinct from Himself. He says in John 14:16:

"And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever."  — John 14:16 (KJV)

I will pray the Father. Jesus prays to the Father. A single person does not pray to themselves. Jesus, the Son, intercedes with the Father as a distinct person addressing another distinct person. And the Father will send another Comforter, the Holy Spirit, who is yet another distinct person who will abide with the disciples.

Three distinct persons, each with distinct roles in the same relational economy of salvation. The Son prays. The Father responds. The Spirit is sent. This is not the language of modes. This is the language of genuine personal relationship within the divine being.

And then there is Jesus's High Priestly Prayer in John 17, where He prays to the Father with a depth of personal intimacy that only genuine personal distinction can explain:

"And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was."  — John 17:5 (KJV)

The glory which I had with thee before the world was. Jesus speaks of a shared pre-existent glory with the Father, a relationship that existed before creation itself. This is not a relationship between a person and his own alter ego. It is the relationship of two genuinely distinct persons who have shared eternal existence and glory together before anything else existed.

Evidence 5: The Apostolic Benediction - 2 Corinthians 13:14

"The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Ghost, be with you all. Amen."  — 2 Corinthians 13:14 (KJV)

Paul closes his second letter to the Corinthians with a benediction that coordinates three distinct persons in a single blessing. The grace of the Lord Jesus Christ. The love of God, referring to the Father. The communion of the Holy Ghost. Three sources of three distinct blessings, coordinated in one sentence as the complete provision of God for His people. This is not an accidental formulation. It is a Trinitarian structure embedded in the normal practice of apostolic worship and blessing.


Three panels representing Father Son and Holy Spirit as distinct persons within one unified divine nature

The Word Trinity Is Not in the Bible. Does That Matter?

This is one of the most frequently raised objections to the doctrine and it deserves a direct and honest answer.

You are correct that the word Trinity does not appear anywhere in the Bible. The term was coined by Tertullian, the North African theologian, in the late second and early third century as a Latin shorthand for a concept the biblical text consistently describes but never labels with a single term.

But the absence of a word does not mean the absence of the concept it describes. This is a basic principle of language and logic that applies far beyond theology. The word gravity does not appear in the Bible but nobody argues that the biblical writers had no concept of things falling to the ground. The word omniscience does not appear in the Bible but God's complete knowledge of all things is taught throughout Scripture. The word rapture does not appear in the Bible but the catching away of believers described in 1 Thessalonians 4:17 is real regardless of what label you put on it.

There is also a popular saying that has been repeated in Christian communities for generations: one with God is majority. You will not find that exact phrase in any verse of the Bible. But you can infer it from multiple passages. Romans 8:31 asks: if God be for us, who can be against us? Psalm 118:6 says: the LORD is on my side; I will not fear. What can man do unto me? The concept is thoroughly biblical. The phrase is not. And nobody argues that the concept is therefore invalid.

The Trinity operates on exactly the same principle. The concept is thoroughly and consistently biblical. The label is a later theological shorthand. Rejecting the Trinity because the word does not appear in Scripture is like rejecting the concept of one with God being majority because that exact phrase does not appear in Scripture. The argument proves too much and ends up undermining far more than it intends to.


The absence of a word does not mean the absence of the concept. The Trinity is taught consistently throughout Scripture. The label is a theological convenience, not a condition of the doctrine's validity.

 

Addressing the Anti-Trinitarian Arguments

Objection 1: The Comma Johanneum - Was 1 John 5:7 Really in the Original Text?

This objection requires the most careful and the most honest treatment in this entire post. And BereanLook's commitment is always to honesty above convenience, so here it is plainly.

The passage in question is 1 John 5:7-8, which in the King James Version reads:

"For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. And there are three that bear witness in earth, the spirit, and the water, and the blood: and these three agree in one."  — 1 John 5:7-8 (KJV)

The phrase in verse 7 referring to the three heavenly witnesses, the Father, the Word and the Holy Ghost, is known among scholars as the Comma Johanneum. And the scholarly consensus on this passage is clear and must be stated honestly: this specific phrase does not appear in the earliest and most reliable Greek manuscripts of the New Testament. It is absent from virtually all Greek manuscripts before the fifteenth century. It appears in late Latin manuscripts and gradually made its way into printed Greek New Testaments through a controversial process.

Erasmus of Rotterdam, the great sixteenth century scholar who produced the first printed Greek New Testament, initially omitted the phrase because it was not in the Greek manuscripts he consulted. He was pressured to include it when a manuscript containing it was produced, and he did so under protest. Most modern translations either omit the heavenly witnesses phrase entirely or include it with a footnote noting its absence from the earliest manuscripts.

This is a real textual issue and it would be dishonest to pretend otherwise. BereanLook goes back to the text. And going back to the text on this passage means acknowledging what the manuscript evidence shows.

But here is what matters most: the Trinity does not need 1 John 5:7. Not even slightly. The doctrine stands completely and robustly on the baptism of Jesus, on Genesis 1:26, on Matthew 28:19, on John 14 to 17, on 2 Corinthians 13:14 and on dozens of other passages across both testaments. Removing one disputed verse from the Trinitarian argument costs nothing because the argument was never primarily built on that verse. The Trinity is not a one-verse doctrine. It is the consistent testimony of the entire biblical canon.

The person who thinks that the textual questions around 1 John 5:7 undermine the Trinity has not been paying attention to the full biblical witness. They have been focused on one tree and missing the entire forest behind it.


BEREANLOOK RESPONSE: The Comma Johanneum is textually disputed and intellectual honesty requires acknowledging that. But the Trinity does not rest on this single passage. It stands on the full and consistent testimony of Scripture from Genesis 1 to Revelation 22. Removing one disputed verse changes nothing about the doctrine.


Objection 2: Oneness Pentecostalism - Jesus Only

Oneness Pentecostalism, sometimes called the Jesus Only movement, teaches that God is absolutely one person, not three, and that Jesus Christ is the full and complete expression of the Godhead. The Father, Son and Holy Spirit are not three distinct persons but three titles or roles of the one person of Jesus. They baptise in the name of Jesus only, not in the Trinitarian formula of Matthew 28:19, arguing that Jesus is the one name of the Godhead.

This position is understandable as an overcorrection against tritheism, the error of treating Father, Son and Spirit as three separate Gods. But it creates problems that the biblical text will not resolve in its favour.

The most immediate problem is the baptism of Jesus. If Jesus is the one person of the Godhead appearing in three roles, who is He praying to in the water? Who is the voice from heaven speaking about Him? If Jesus is simultaneously the Father speaking from heaven and the Son standing in the water and the Spirit descending as a dove, He is somehow in three distinct places doing three distinct things at the same time while apparently unaware that He is doing them. That is not a theological position. That is an impossibility.

Furthermore, Jesus's prayer life throughout the gospels is inexplicable on the Oneness model. He prays to the Father constantly. In Gethsemane He cries: O my Father, if it be possible, let this cup pass from me (Matthew 26:39). On the cross He cries: My God, my God, why hast thou forsaken me? (Matthew 27:46). If Jesus is the Father, He is praying to Himself and being forsaken by Himself. These are not metaphors or poetic expressions. They are genuine personal communications between two genuinely distinct persons.


BEREANLOOK RESPONSE: The Oneness position cannot explain Jesus's prayer life, His cry of dereliction on the cross or the simultaneous presence of three distinct persons at His baptism. A single person cannot pray to themselves, be forsaken by themselves or appear in three distinct locations doing three different things at the same time.


Objection 3: Jehovah's Witnesses - Jesus Is a Created Being

The Jehovah's Witnesses teach that Jesus Christ is not co-equal or co-eternal with the Father but is the first and greatest of God's created beings, identified with the archangel Michael. They famously translate John 1:1 in their New World Translation as: In the beginning was the Word, and the Word was with God, and the Word was a god, inserting the indefinite article to make Jesus a lesser divine being rather than fully God.

The Greek of John 1:1 does not support this translation. The phrase theos en ho logos, and the Word was God, uses theos without the definite article not to make it indefinite but because of a well-established Greek grammatical rule known as Colwell's Rule, which demonstrates that a definite predicate noun preceding the verb does not require the article. The absence of the article before theos in this clause does not make Jesus a lesser god. It is a normal Greek grammatical construction.

John 1:1 is reinforced by John 1:3 which says: All things were made by him; and without him was not any thing made that was made. If Jesus made all things and nothing was made without Him, then Jesus Himself was not made. A created being cannot be the creator of all things including himself. The logic is airtight. Jesus is not a created being. He is the eternal Creator.

John 20:28 provides the most direct statement in the entire New Testament when Thomas, confronted with the risen Jesus, says: My Lord and my God. Jesus does not correct Thomas. He does not say: I am not God, you are mistaken. He accepts the declaration. If Jesus were a created being and not fully God, allowing a human being to address Him as God while failing to correct the error would be a profound deception. Jesus never deceived anyone.


BEREANLOOK RESPONSE: The Greek of John 1:1 does not support the Jehovah's Witness translation. John 1:3 establishes that Jesus made all things, making it logically impossible for Him to be a created being. And Thomas's declaration of My Lord and my God in John 20:28 is accepted without correction by Jesus Himself.


Objection 4: Modalism - Three Modes of One Person

Modalism, also called Sabellianism after its early proponent Sabellius, teaches that God is one person who has revealed Himself in three different modes or manifestations at different times in redemptive history. The Father in the Old Testament. The Son during the incarnation. The Holy Spirit after Pentecost. Not three distinct persons but one person wearing three successive masks.

The baptism of Jesus destroys modalism comprehensively. At Jesus's baptism, as we have already established, the Father speaks from heaven, the Spirit descends as a dove and the Son stands in the water simultaneously. Three distinct presences. Three distinct actions. Three distinct locations. At the same moment. Modalism has no coherent explanation for this event because a single person cannot be in three distinct places simultaneously doing three distinct things.

Furthermore, modalism cannot account for the pre-incarnate relationship between the Father and the Son described in John 17:5, where Jesus speaks of the glory which I had with thee before the world was. This pre-creation relationship between Father and Son is not the relationship of a person with their own future mode of existence. It is the eternal relationship of two genuinely distinct persons who have shared glory before time began.


BEREANLOOK RESPONSE: Modalism cannot survive the baptism of Jesus where all three persons are simultaneously present in three distinct locations doing three distinct things. Nor can it account for the pre-creation relationship between Father and Son described in John 17:5. One person cannot simultaneously be in three places or have a relationship with their own future self.

 

Why Getting the Trinity Right Changes Everything

Now let us come to the practical consequence that makes this more than a doctrinal exercise. Because the way you understand the Trinity determines the way you relate to God. And that has consequences for every dimension of your spiritual life.

It Changes How You Pray

If the Father, Son and Holy Spirit are simply three names for the same person, prayer loses a dimension of its richness. But when you understand that you are praying to the Father, in the name of the Son who intercedes for you (Romans 8:34), empowered by the Holy Spirit who helps your infirmities and makes intercession for you with groanings that cannot be uttered (Romans 8:26), prayer becomes a trinitarian conversation. You are not alone when you pray. The entire triune God is engaged in your praying. The Spirit helps you frame the words. The Son presents them to the Father. The Father hears and responds. That is not a mechanical process. It is an intimate relational reality that only the Trinity makes possible.

It Changes How You Understand Salvation

The plan of salvation is a trinitarian project. The Father sent the Son (John 3:16). The Son came and accomplished redemption through His death and resurrection. The Holy Spirit applies the work of redemption to individual human beings through conviction, regeneration and indwelling. Remove any one of the three persons and the plan of salvation loses a critical dimension.

Without the distinct personhood of the Son, the incarnation becomes a performance rather than a genuine entering of the divine into human experience. Without the distinct personhood of the Holy Spirit, sanctification becomes a matter of human effort rather than divine empowerment. Without the distinct personhood of the Father to whom the Son is accountable and to whom we are reconciled, the relational dimension of salvation collapses into an abstraction.

It Changes How You Relate to the Holy Spirit

Perhaps the most practically significant consequence of a correct Trinitarian theology is what it does to your relationship with the Holy Spirit. If the Holy Spirit is simply a force or an influence rather than a genuinely distinct divine person, you will treat Him accordingly. You will seek His power rather than His person. You will want His gifts without pursuing His fellowship.

But Ephesians 4:30 says: And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption. You cannot grieve a force. You cannot grieve an influence or an atmosphere. You can only grieve a person. The Holy Spirit can be grieved because He is a person. A distinct, genuine, fully divine person who has genuine emotional engagement with how you live your life. Understanding that changes everything about how you relate to His presence, His promptings and His work in your life.


A wrong understanding of the Trinity does not just produce doctrinal error on paper. It produces a distorted prayer life, a distorted understanding of salvation and a distorted relationship with the Holy Spirit. Getting the Trinity right is not academic. It is deeply and practically personal.


A Final Word

The Trinity is difficult to comprehend fully. It should be. We are attempting to understand the internal nature of an infinite Being with finite minds. The very difficulty of the concept is part of its authenticity. A God who was fully comprehensible to the human mind would be a God small enough to fit inside the human mind. And a God that small would not be worth worshipping.

But what the biblical text gives us is enough. More than enough. The plural Elohim of Genesis. The three persons simultaneously present at the baptism of Jesus. The one name of three persons in the Great Commission. The constant distinction between Father, Son and Spirit throughout John 14 to 17. The apostolic benediction of 2 Corinthians 13:14. The logic of John 1:1 and John 1:3. The declaration of Thomas in John 20:28.

One God. Three distinct persons. Each fully divine. Each genuinely personal. Eternally related. Eternally united. Eternally one.

This is not a human invention imposed on a simpler biblical reality. It is the consistent testimony of the full biblical text, from the opening words of Genesis to the final vision of Revelation. And it is the foundation on which a genuine, personal, relationally rich knowledge of God is built.

Know the Trinity. Not just as a doctrine to defend but as the reality you are invited into every time you pray, every time you receive grace and every time the Holy Spirit moves in your life.

Back to the Text. Every Time.

BereanLook | bereanlook.com

 

Join the Conversation

Has this post settled questions you have carried about the Trinity? Or has it raised new ones? Share your thoughts in the comments below. And if someone in your life holds an anti-Trinitarian position, share this post with them. The text has answered every objection.

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Related Posts on BereanLook:

        The Doctrine of God: Who IsGod and What Do We Actually Know About Him? Part 1

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        Was Jesus Just a Good Teacher? Why That Answer Is Not Good Enough

        The Doctrine of Revelation: How Does God Speak and How Do We Know It Is Him? Part 1

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