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What is the Trinity? (one God in three persons, Father, Son, Holy Spirit)

FaithMulti-view · no verdict

Short answer

The Trinity is the historic Christian teaching that there is one God who exists eternally as three distinct persons, the Father, the Son (Jesus), and the Holy Spirit, each fully God, yet not three gods but one. The word 'Trinity' does not appear in the Bible; the teaching is drawn together from what the Bible says, holding four claims at once:

  1. There is only one God (Deuteronomy 6:4; Isaiah 44:6).
  2. The Father is God, the Son is God (John 1:1; John 20:28), and the Holy Spirit is God (Acts 5:3; Acts 5:4).
  3. The three are distinct persons, not one person playing three roles (John 14:16–John 14:17; Matthew 3:16–Matthew 3:17).
  4. Therefore: one God, three persons.

The single clearest gathering of all three is Jesus' command to baptize 'in the name of the Father and of the Son and of the Holy Spirit' (Matthew 28:19), one 'name,' three persons.

Question

What is the Trinity? (one God in three persons, and where the Bible teaches it)

Analysis

Held together from the whole Bible

No single verse states the doctrine in one sentence; it is the only way to hold all the Bible's data together. Scripture insists relentlessly that God is one (Deuteronomy 6:4; Isaiah 44:6), so Christians are monotheists, not believers in three gods. Yet it also calls the Father God, presents the Son as God ('the Word was God,' John 1:1; Thomas calls the risen Jesus 'my Lord and my God,' John 20:28), and treats the Holy Spirit as God (lying to the Spirit is lying to God, Acts 5:3; Acts 5:4). And the three are clearly distinct, the Son prays to the Father and sends the Spirit (John 14:16; John 14:26), and at Jesus' baptism all three appear at once: the Son in the water, the Spirit descending, the Father's voice from heaven (Matthew 3:16; Matthew 3:17).

What it does and doesn't mean

The doctrine deliberately guards against two errors: it is not three separate gods (that denies Deuteronomy 6:4), and it is not one person appearing in three modes or masks (that denies the distinctness seen at the baptism and in Jesus praying to the Father). Jesus can say 'I and the Father are one' (John 10:30) while also being distinct from the Father. The blessing of 2 Corinthians 13:14 names all three together, grace from the Son, love from the Father, fellowship of the Spirit. The 'how' remains a genuine mystery that no earthly analogy fully captures; the Bible asks us to affirm what it teaches, not to fully explain it.

A note on those who reject it

The Trinity is affirmed by the vast majority of Christians across Catholic, Orthodox, and Protestant traditions, formalized in the early creeds (Nicaea, AD 325). Some groups reject it and read the same verses differently, the deity of Christ specifically is treated in the "Is Jesus God?" answer, which lays out the mainstream and non-Trinitarian positions side by side.

Sources, trace every one

Every cited verse, in full. Tap any reference to open it in the reader.

  • Deuteronomy 6:4bsb

    Hear, O Israel: The LORD our God, the LORD is One.

  • Isaiah 44:6bsb

    Thus says the LORD, the King and Redeemer of Israel, the LORD of Hosts: “I am the first and I am the last, and there is no God but Me.

  • John 1:1bsb

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

  • John 20:28bsb

    Thomas replied, “My Lord and my God!”

  • Acts 5:3bsb

    Then Peter said, “Ananias, how is it that Satan has filled your heart to lie to the Holy Spirit and withhold some of the proceeds from the land?

  • Acts 5:4bsb

    Did it not belong to you before it was sold? And after it was sold, was it not at your disposal? How could you conceive such a deed in your heart? You have not lied to men, but to God!”

  • John 14:16bsb

    And I will ask the Father, and He will give you another Advocate to be with you forever —

  • John 14:17bsb

    the Spirit of truth. The world cannot receive Him, because it neither sees Him nor knows Him. But you do know Him, for He abides with you and will be in you.

  • Matthew 3:16bsb

    As soon as Jesus was baptized, He went up out of the water. Suddenly the heavens were opened, and He saw the Spirit of God descending like a dove and resting on Him.

  • Matthew 3:17bsb

    And a voice from heaven said, “This is My beloved Son, in whom I am well pleased!”

  • Matthew 28:19bsb

    Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,

  • John 14:26bsb

    But the Advocate, the Holy Spirit, whom the Father will send in My name, will teach you all things and will remind you of everything I have told you.

  • John 10:30bsb

    I and the Father are one.”

  • 2 Corinthians 13:14bsb

    The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with all of you.

On contested questions we show every major view, attributed and cited, and pick no winner. Answers are synthesized from primary sources, truth you can trace, not opinion.

What is the Trinity? (one God in three persons — Father, Son, Holy Spirit) · Bubble Bible