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The Trinity Explained

One God, eternally existing in three persons: Father, Son and Holy Spirit.

Published Updated 12 min read

The Trinity is the hardest teaching of the Christian faith, and for many believers the most beautiful. It says that the one true God exists eternally as three distinct persons (Father, Son and Holy Spirit) who are equally and fully God. Not three Gods. Not one God taking turns in three roles. One being, three persons, in eternal communion. Many objections to the Trinity are aimed at ideas Christians do not hold, such as belief in three gods, so it is worth seeing what the Bible teaches and what the creeds have confessed since the early centuries of the church.

One God in three persons: what it means

Christians use two different words to say this carefully. God is one in being (what God is) and three in person (who God is). There is one divine nature, not three, and the Father, the Son and the Holy Spirit each share all of it. They are not three parts of God, as if each were a third. And they are not three names for one person: they speak to each other, love each other and send each other.

The table gathers the Bible's two lines of teaching. Each person is called God, and each is shown to be distinct from the others. Hold both lines at once and you have the doctrine of the Trinity.

Person
PersonVerses that call Him GodVerses that show He is distinct
The Father“there is but one God, the Father” (1 Corinthians 8:6, KJV); Galatians 1:1; John 6:27Matthew 3:17 (speaks from heaven about the Son); John 17:5 (the Son prays to Him); John 14:16 (gives another Comforter)
The Son“the Word was God” (John 1:1, KJV); “My Lord and my God” (John 20:28, KJV); Hebrews 1:8; Colossians 2:9“the Word was with God” (John 1:1, KJV); John 17:24 (loved by the Father before the world began); Mark 1:10-11
The Holy SpiritActs 5:3-4 (lying to the Holy Ghost is lying to God); 1 Corinthians 3:16; 2 Corinthians 3:17; “the eternal Spirit” (Hebrews 9:14, KJV)“another Comforter” (John 14:16, KJV); John 15:26; John 16:13-14; Romans 8:26-27 (intercedes for us)

No single verse proves the whole doctrine; the Trinity is how Christians hold all of these together.

1

There is only one God

The Trinity does not begin with three. It begins with one. The Bible is uncompromisingly monotheistic: there is one true God, the maker of heaven and earth. Christianity is not polytheism with a Christian flavor. Whatever else we say about Father, Son and Holy Spirit, we never say there are three Gods. The early Church fought hard to keep this clear: one God, full stop.

“Hear, O Israel: The Lord our God, the Lord is one.”
Deuteronomy 6:4NIV
2

The Father is fully God

The Father is the one Jesus called “Abba, Father” (Mark 14:36, KJV): the eternal source of all things. He is not the only person who is God, but He is fully God. Throughout the Bible the Father is shown as the one who plans salvation, sends the Son and gives the Spirit.

“Yet for us there is but one God, the Father, from whom all things came and for whom we live...”
1 Corinthians 8:6NIV
3

The Son is fully God

Jesus is not an angel, not a created being, not the first thing God made. The New Testament repeatedly identifies Him as God: He receives worship, forgives sins, claims to exist before Abraham, says “I and the Father are one” (John 10:30, NIV), and Thomas calls Him “My Lord and my God” (John 20:28, KJV). Yet He prays to the Father, distinct from Him. Two persons, one God.

“In the beginning was the Word, and the Word was with God, and the Word was God.”
John 1:1NIV
4

The Holy Spirit is fully God

The Holy Spirit is not just God's energy or influence. He is a person: He speaks, can be grieved, intercedes, teaches and convicts. And He is fully God: lying to the Spirit is lying to God (Acts 5:3-4). The Spirit gives life, makes people new, lives in believers and applies salvation to the Church. He is the third person of the Trinity, distinct from the Father and the Son, but one God with them.

“...you have lied to the Holy Spirit... You have not lied just to human beings but to God.”
Acts 5:3-4NIV
5

The three persons relate to each other eternally

Jesus' great commission gives the clearest Trinitarian formula in the New Testament: one name (singular) belonging to three persons. The persons are not three masks God wears at different times. Father, Son and Spirit have always existed in love and communion with each other. This is the deepest mystery of Christianity, and its deepest comfort.

“...baptizing them in the name of the Father and of the Son and of the Holy Spirit...”
Matthew 28:19NIV

A short history of the doctrine

The Church did not invent the Trinity in the fourth century, as is sometimes claimed. The pattern of Father, Son and Spirit runs through the New Testament: Matthew 28:19, 2 Corinthians 13:14, 1 Peter 1:2 and many other passages. The word came later. The Greek trias is first found in Theophilus of Antioch around AD 180, and the Latin trinitas afterwards in Tertullian.

What the fourth century added was definition. When Arius taught that the Son was a created being, the Council of Nicaea (325) answered that the Son is of the same substance as the Father, using the Greek word homoousios. The Council of Constantinople (381) confirmed the Nicene faith and enlarged the creed, with new emphasis on the divinity of the Holy Spirit. In the English of the 1662 Book of Common Prayer, the Nicene Creed confesses the Son as “Begotten, not made, Being of one substance with the Father.”

The Athanasian Creed, a Latin creed named after Athanasius but probably not written by him, sums it up. After confessing that the Father, the Son and the Holy Ghost are each God, it says they are “not three Gods” “but one God,” and it warns against “confounding the Persons” or “dividing the Substance.”

The three persons across the Bible

ReferenceBookTheme
Genesis 1:26Genesis“Let us make man in our image” (Genesis 1:26, KJV): God speaks as “us,” which many Christian readers have seen as a first hint of the Trinity
Isaiah 48:16IsaiahThe Lord GOD and His Spirit send the speaker
Matthew 3:16-17MatthewJesus' baptism: the Father speaks, the Son rises, the Spirit descends
John 14:16-17JohnJesus prays to the Father to send the Spirit
John 15:26JohnThe Spirit proceeds from the Father, sent by the Son
Romans 8:9-11RomansThe Spirit of God is also called the Spirit of Christ
2 Corinthians 13:142 CorinthiansThe grace of Christ, the love of God, the communion of the Holy Ghost
Ephesians 4:4-6EphesiansOne Spirit, one Lord, one God and Father

Common misconceptions

A few things people often get wrong on this topic.

MythThe Trinity means three Gods.

TruthNo. There is only one God. The Trinity says the one God exists as three persons in eternal communion. The belief in three gods (tritheism) is an error the Church has always rejected.

MythThe Trinity is just God in three modes, like water as ice, liquid and vapor.

TruthThis is called modalism, and the Church rejected it early: Sabellius, who taught it at Rome, was excommunicated around AD 220. The Father, the Son and the Spirit are three distinct persons who exist at the same time and relate to each other, not one person playing three roles.

MythThe Son was created by the Father at some point.

TruthThis is Arianism, which the Council of Nicaea rejected in 325. The Son is “Begotten, not made,” in the words of the Nicene Creed: eternally from the Father, sharing the same divine being. There was never a time when the Son did not exist.

MythThe Trinity is a contradiction the Church has tried to paper over.

TruthThe Trinity is a mystery, not a contradiction. A contradiction would be “God is three Gods and one God.” The Trinity is “God is one being and three persons”: two different categories that can both be true.

MythThe Trinity isn't important for everyday Christian life.

TruthIt is foundational. Christians pray to the Father, through the Son, by the Spirit. We are saved because the Father planned it, the Son accomplished it and the Spirit applies it. Lose the Trinity and the whole shape of Christian salvation collapses.

Living with a triune God

  1. Pray Trinitarian prayers

    Try addressing your prayers explicitly: “Father, in the name of Jesus, by the Holy Spirit...” It roots prayer in the God you are actually praying to.

  2. Read the New Testament with Trinitarian eyes

    When you read the Gospels, notice the conversations between Jesus and the Father. When you read the letters, watch for the Spirit. The Bible is full of the Trinity once you start looking.

  3. Memorize one Trinitarian blessing

    Try 2 Corinthians 13:14: “May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all” (2 Corinthians 13:14, NIV). Pray it over yourself, your family and your friends.

  4. Worship the persons by name

    Christians have always worshiped the Father, the Son and the Spirit, each as God. Choose songs and prayers that name the persons rather than only "God" in the abstract.

  5. Bring your questions

    The Trinity raises honest questions. Bring them to your pastor or a mature friend. In Faithero you can also ask the Bible Guide; it names the verses it draws on, and like any guide it can be wrong, so test what it says against Scripture.

Frequently asked

What is the Trinity in simple words?

The Trinity means there is one God who exists as three persons: the Father, the Son (Jesus) and the Holy Spirit. Each is fully God, and they are not three gods but one. They are also not three names for one person, because they speak to each other, love each other and send each other.

Is the word 'Trinity' in the Bible?

No, the word does not appear in Scripture. The Greek trias is first found in the writings of Theophilus of Antioch around AD 180, and the Latin trinitas afterwards in Tertullian. But the teaching the word names is in the Bible: there is one God, the Father is God, the Son is God, the Holy Spirit is God, and the three are distinct. “Trinity” is a one-word summary of all five truths.

Where is the Trinity in the Bible?

Not in one verse but across the New Testament. Jesus sends His disciples to baptize “in the name of the Father, and of the Son, and of the Holy Ghost” (Matthew 28:19, KJV): one name, three persons. At His baptism the Son comes up from the water, the Spirit descends and the Father speaks (Matthew 3:16-17). Paul blesses a church with the grace of Christ, the love of God and the communion of the Holy Ghost (2 Corinthians 13:14), and Jesus’ farewell words in John 14 to 16 show the three persons working together.

Is the Trinity like water, ice and steam?

It is a well-meant picture, but it describes an old error called modalism: one thing appearing in three forms, one after another. Christians reject that, because the Father, the Son and the Spirit exist at the same time and relate to each other: at Jesus’ baptism the Son stands in the river, the Spirit descends and the Father speaks from heaven (Matthew 3:16-17). The church rejected modalism early; Sabellius, who taught it at Rome, was excommunicated around AD 220. Every picture of God falls short, and the Athanasian Creed gives a safer rule: no “confounding the Persons” and no “dividing the Substance.”

How can God be three and one at the same time?

God is one in being and three in person. He is not three Gods, and not one God playing three roles, but one God who eternally exists as three distinct persons in a relationship of love. Three and one would only contradict each other if "being" and "person" meant the same thing. They do not.

Did Jesus pray to Himself?

No. Jesus prayed to the Father, a different person. Father and Son are distinct persons within the one God. Their conversation in Scripture (for example John 17) is a window into the eternal relationship within God Himself.

Is the Trinity a contradiction?

No, it is a mystery. A contradiction would be: God is one being and three beings. The Trinity says: God is one being and three persons. Being and person are different categories. The doctrine is beyond full human understanding, but it is not incoherent.

Why does the Trinity matter for everyday Christian life?

Because Christianity is not a relationship with one solitary God but with a God who is, in His very nature, love and communion. Christians pray to the Father, through the Son, by the Spirit. We are saved because the Father planned it, the Son accomplished it and the Spirit applies it. Worship, prayer and salvation are Trinitarian from start to finish.

Why this matters more than you think

For many Christians the Trinity feels like fine print: true, perhaps, but distant from real life. That gets it backwards. The Trinity is the shape of the gospel. If God is not three persons, the Father did not send the Son out of love, the Son did not pray to the Father, and the Spirit was not sent to live in us. Strip out the Trinity and salvation becomes a transaction. Keep it, and salvation is the Father bringing prodigals home through the work of the Son and the presence of the Spirit.

The Trinity also tells us something about the universe: love is not an afterthought. Before there was a world, there was love within God. Jesus says the Father loved Him “before the foundation of the world” (John 17:24, KJV), and the Spirit shares that one life of love. We were made by a God whose own life is communion, which is why we hunger for connection, why we ache when relationships break, and why love is the highest thing.

Keep learning, one chapter a night

Faithero gives you a chapter for each evening, reads it aloud if you like, and lets you ask the Bible Guide anything about what you read.

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