Biblical Unitarian: Isaac Newton
Newton strongly disagreed with the Trinity, believing the Father was God, Jesus was a human that was the Son of God, and the Holy Spirit was a personification of God’s power. The evidence often cited by the Catholic Church was 1 John 5:7-8, which adds, “these three are one.” However, this is only found within the Textus Receptus, which the King James Version was translated from. Newton believed “these three are one” was an addition and forgery to the text. Textual scholars, who dubbed the forgery the “Johannine Comma”, would later vindicate Newton. Newton also believed that the Trinity was not originally the Christian doctrine of the Godhead, a position later vindicated by scholars. The method Newton used in determining the authenticity of the Johannine Comma, or the lack thereof, was to compare texts and writings of some early Catholic Church Fathers. None of the text mentioned the phrase, including those trying to prove the Trinity. Accordingly, Newton concluded it was not authentic.
Sources:
Observations Upon the Prophecies of Daniel and the Apocalypse of St. John
Misquoting Jesus: The Story Behind Who Changed the Bible and Why
How Jesus Became God: The Exaltation of a Jewish Preacher from Galilee
When Jesus Became God: The Struggle to Define Christianity during the Last Days of Rome
The Doctrine of the Trinity: Christianity’s Self-Inflicted Wound