The Council of Nicaea was not called by a prophet or an emissary — it was called by Constantine, a Roman Emperor who had not yet been baptized and who continued to worship the sun god Sol Invictus. The council's goal was political unity, not scriptural truth. The result was the Nicene Creed, which declared the Son to be "of the same substance" (homoousios) as the Father — a Greek philosophical term that appears nowhere in Scripture. Bishops who refused to sign were exiled. The doctrine was not discovered in the text. It was voted into existence.
Council of Nicaea — The Trinity Becomes Policy
Roman Emperor Constantine convenes the council that formally enshrines the Trinity — the key term comes from Greek philosophy, not Scripture.