core argument
The Trinity is a biblical conclusion
The objection that the word Trinity is not in the Bible only matters if the doctrine is absent. The biblical claims are not absent.
The doctrine summarizes several biblical facts
Scripture teaches one God. It identifies the Son as God and Creator. It treats the Spirit as divine. It also distinguishes Father, Son, and Spirit personally. The Trinity is a doctrinal synthesis of those claims, not a denial of any one of them.
Matthew 3 does not disprove the Trinity by distinguishing Father, Son, and Spirit. It disproves modalism. Trinitarian Christianity already teaches real personal distinction.
LDS rejection is not merely anti-creedal wording
LDS sources reject post-New Testament creeds and define the Godhead as distinct beings united in purpose. That is a direct rejection of one divine being in three persons.
So the disagreement is not whether fourth-century Christians used technical terms. It is whether the terms faithfully guard the biblical data.
The biblical pattern is cumulative
The doctrine rests on several claims held together: there is one God; the Son is God and Creator; the Spirit is treated as divine; and Father, Son, and Spirit are personally distinct.
Removing any one of those claims distorts Scripture. The Trinity is the Christian way of refusing to remove any of them.
Distinction does not disprove the Trinity
Texts where the Father speaks to the Son or the Spirit descends do not refute Trinitarian doctrine. They refute modalism, the idea that Father, Son, and Spirit are only one person appearing under different names.
The LDS disagreement is different. LDS doctrine treats the Godhead as separate divine beings. Christianity treats the Father, Son, and Holy Spirit as distinct persons who are the one God.
Nicaea named an older question
The later word Trinity does not make the doctrine late. Christians used technical language because Scripture forced the question: if there is one God, and the Son creates all things, receives divine honor, and is distinct from the Father, how must the church confess Him?
Nicaea answered that the Son is true God, begotten not made. LDS doctrine rejects that answer and therefore rejects the Christian center.
Primary references
The argument rests on public Scripture, official LDS material, and Christian sources.
Deuteronomy 6
BibleRef
Christian monotheism inherits Israel's confession, not a council of true gods.
John 1
BibleRef
If all created things came through Christ, Christ is not inside the created order.
Colossians 1
BibleRef
The Son is before all created things, not one spirit child among others.
Matthew 28
BibleRef
Triadic language belongs with one divine name, not three unrelated beings.
Acts 5
BibleRef
The Spirit is treated as divine, not merely an impersonal influence.
Godhead, Topics and Questions
The Church of Jesus Christ of Latter-day Saints
Official LDS teaching that the Father, Son, and Holy Ghost are distinct beings, one in purpose and doctrine.
Do Latter-day Saints Believe in the Trinity?
The Church of Jesus Christ of Latter-day Saints
Official LDS article saying Latter-day Saints do not believe in the traditional Trinity and instead teach three separate beings united in purpose.
Holy Ghost, Topics and Questions
The Church of Jesus Christ of Latter-day Saints
Official LDS source teaching that the Holy Ghost is the third member of the Godhead and a personage of spirit.
The Only True God and Jesus Christ Whom He Hath Sent
The Church of Jesus Christ of Latter-day Saints
General Conference address openly rejecting the doctrine of three persons in one substance.
Nicene Creed
United States Conference of Catholic Bishops
Representative text of the historic Nicene confession of one God, the Trinity, and the eternal deity of Christ.