Related Posts: Four Important Early Christian Creeds; Mormonism and Creeds of Christendom; Is Mormonism Christian?; Whom do we Worship?; The Nature of Christ; The First Vision; Godhead: God or Gods?
In this post the word Trinity to refers to the conventional Christian sense, not the LDS sense.
The first Article of Faith in the (LDS) church is, “We believe in God the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost.” In Joseph Smith’s first revelatory experience he saw God the Father and Jesus Christ: “I saw two Personages, whose brightness and glory defy all description, standing above me in the air” (JS-History 1:17). Thus it was established early on in the church that the Father and Son were not of one essence or of the same substance. The clearest expression of this belief is this: “the Father has a body of flesh and bones as tangible as man’s; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage of Spirit” (D&C 130:22). Our belief in the physicality of God’s person cannot admit a rational three-Persons-concurring-in-one-Being view of God.
Does the Book of Mormon teach a Trinitarian view of the Godhead?
One passage often quoted by anti-Mormon writers is 2 Nephi 31:21. There Nephi says,
[Christ is the only] name given under heaven whereby man can be saved in the kingdom of God. And now, behold, this is the doctrine of Christ, and the only and true doctrine of the Father, and of the Son, and of the Holy Ghost, which is one God, without end.