The Godhead
Articles of Faith 1:1
1 We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost.
President Dallin H. Oaks said:
“Our first article of faith declares, ‘We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost.’ We join other Christians in this belief in a Father and a Son and a Holy Ghost, but what we believe about Them is different from the beliefs of others. We do not believe in what the Christian world calls the doctrine of the Holy Trinity. In his First Vision, Joseph Smith saw two distinct personages, two beings, thus clarifying that the then-prevailing beliefs concerning God and the Godhead were not true.
“In contrast to the belief that God is an incomprehensible and unknowable mystery is the truth that the nature of God and our relationship to Him is knowable and is the key to everything else in our doctrine. The Bible records Jesus’s great Intercessory Prayer, where He declared that ‘this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent’ (John 17:3).”
(“The Godhead and the Plan of Salvation,” Ensign or Liahona, May 2017, 100.)