Where it comes from, what scriptures are used to support it, and what the Bible itself plainly says.
The Bible speaks often of the Father, Jesus Christ, and the holy spirit. But the formal doctrine of the Trinity, as commonly stated by churches, was shaped through later theological debate.
First-century Christians worshiped the Father, followed Jesus as Lord and Christ, and received holy spirit from God. But the later formula “one God in three persons” was defined after the apostles.
The Council of Nicaea in 325 CE dealt mainly with the relationship of the Father and Son. The Council of Constantinople in 381 CE further developed the position regarding the holy spirit. Those councils helped form the later creedal Trinity doctrine.
Trinitarians point to Father, Son, and holy spirit being named together. However, the passage also says Jesus was given authority, which shows received authority rather than self-originating authority.
This is one of the strongest passages used by Trinitarians. It presents the Word as preexistent and divine. At the same time, it distinguishes the Word from “God” whom he was with, and later identifies him as the Son who explains the Father.
Trinitarians usually read this as unity of essence. But in John 17, Jesus also prays that his disciples may be “one,” showing that “one” can mean unity in purpose, agreement, and work.
This is also used as direct support for Jesus’ divine status. But the same chapter includes Jesus saying, “I ascend to my Father and your Father, to my God and your God.” That keeps a distinction between Jesus and the God he worships.
This is used because the three are mentioned together. But naming three together does not by itself prove that all three are one co-equal God.
The Bible begins with strict devotion to one God. It does not describe that one God as three persons.
This is one of the clearest statements. Jesus distinguishes himself from the Father and calls the Father “the only true God.”
That statement is difficult to harmonize with the claim that the Father and Son are absolutely co-equal in the same sense.
Paul identifies the “one God” as the Father and the “one Lord” as Jesus Christ. This gives Jesus a uniquely exalted place, but still distinguishes him from the one God, the Father.
This passage plainly shows order: God gives authority to Christ, Christ rules, then Christ subjects himself to God. That is hard to square with absolute co-equality.
A mediator stands between two parties. Here the one God is distinct from the mediator, Christ Jesus.
The Father: The Father is repeatedly identified as God, the source of life, authority, and truth.
The Son: Jesus is God’s Son, Lord, Christ, King, Savior, Mediator, and the one through whom God works. He is uniquely exalted above all others.
The holy spirit: The holy spirit is presented as coming from God, being given by God, and empowering God’s servants. Whether it is a separate person is debated, but the Bible often describes it as God’s spirit, power, presence, or gift.
Acts 2:36 Colossians 1:15 Ephesians 4:1-6 Exodus 33:18-20 1 Corinthians 15:28
If I set aside later church councils and read only the Bible, I would not conclude that the Bible plainly teaches the later Trinity formula. I would conclude that the Bible teaches one supreme God, the Father; one uniquely exalted Lord and Christ, Jesus the Son of God; and holy spirit from God operating in and through God’s servants.
The Trinity doctrine is therefore best described as a later theological attempt to harmonize Bible passages, not as a doctrine directly stated in Scripture itself.
Study note: Scripture links point to existing local /BibleVerses/ pages when matching files were found in the provided file list.