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Is It Actually in the Bible?
Phrases people quote as Scripture. The real verse, or the honest answer that there is not one.
The word "Trinity" is in the Bible
The doctrine is argued from many texts; the word itself is 2nd-3rd century theological vocabulary.
No New Testament writer uses a word equivalent to "Trinity." The vocabulary develops afterward: Theophilus of Antioch is the first writer on record to use the Greek trias ("triad") for God, around AD 180, and the Latin trinitas is credited to Tertullian, writing against a rival teacher named Praxeas around AD 200-206. Both terms predate the Council of Nicaea (325), which formalized much of the doctrine's classical language but still didn't coin the word.
The doctrine itself is argued, not asserted by a proof-text: it's assembled from passages like the baptismal formula ("in the name of the Father and of the Son and of the Holy Spirit," Matthew 28:19) and Paul's benediction ("the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit," 2 Corinthians 13:14), where Father, Son, and Spirit appear together in a single act or blessing without any accompanying explanation of how three relate to one. "Trinity" is the label later theologians gave to what those texts imply; it isn't a word any of them used.
