Here is what one person posted : Taken from the EGW estate website:
What did Ellen White believe regarding the Godhead?
Ellen White never used the term "trinity," although she did refer to the "three living persons of the heavenly trio" (Evangelism, p. 615). She believed in the full deity of Christ, stating that "Christ was God essentially, and in the highest sense. He was with God from all eternity, God over all, blessed forevermore" (Review and Herald, April 5, 1906). She also referred to the Holy Spirit as "the Third Person of the Godhead" (The Desire of Ages, p. 671). Her comments, as collected in Evangelism, pages 613-617, suggest that she believed that the Scriptures taught the existence of three co-eternal divine persons.
History of Trinity Doctrine Among Adventists
William Miller, the founder of the Adventist movement and promoter of the 1844 end of the world teaching, was a Trinitarian: "I believe in one living and true God, and that there are three persons in the Godhead — as there is in man, the body, soul, and spirit. And if anyone will tell me how these exist, I will tell him how the three persons of the Triune God are connected" (quoted by James White in Sketches of the Christian Life and Public Labors of William Miller, Battle Creek, Michigan: Steam Press of the Seventh-day Adventist Publishing Association, 1875, p. 59).
Adventist leader Joshua V. Himes wrote about early Adventists: "At first, they were generally Trinitarians; subsequently they have, almost unanimously, rejected the Trinitarian doctrine as unscriptural." Their accepted statements regarding the Godhead were, "That there is one living and true God, the Father Almighty, who is unoriginated, independent, and eternal, the Creator and Supporter of all worlds; and that this God is one spiritual intelligence, one infinite mind, ever the same, never varying. . . That Christ is the Son of God, the promised Messiah and Saviour of the world. . . ." (Joshua V. Himes, "Christian Connection", Encyclopedia of Religious Knowledge, edited by T. Newton Brown, Boston: Shattuck & Co., 1835, p. 362).
Elder Joseph Bates, who introduced the Sabbath to the Adventists via his meeting with Seventh Day Baptists, became a staunch Anti-Trinitarian: "Respecting the Trinity, I concluded that it was impossible for me to believe that the Lord Jesus Christ, the Son of the Father, was also the Almighty God, the Father, one and the same being. I said to my father, ‘If you can convince me [we] are one in this sense, that you are my father, and I your son, and also that I am your father, and you my son, then I can believe in the Trinity" . . . (Joseph Bates, The Autobiography of Elder Joseph Bates, Battle Creek, Michigan: Steam Press of the Seventh-day Adventist Publishing Association, 1868).
Early Adventist leaders were all Anti-Trinitarians. James White referred to Christ as the "Angel" who led the Hebrews, and was a lesser being than the eternal Father (James White, Christ in the Old Testament, Oakland, California: Pacific Press Publishing Association, 1877, p. 11). J.M. Stephenson wrote that "The idea of Father and Son supposes priority of the existence of the other. To say that the Son is as old as his father, is a palpable contradiction of terms. It is a natural impossibility for the Father to be as young as the Son, or the Son to be as old as the Father" (J.M. Stephenson, "The Atonement," Review and Herald, VI, November 14, 1854, p. 128). These Anti-Trinitarian views are termed "Arianism." Arians believe that the Son is not co-eternal or co-equal with the Father, as stated by the Nicene Creed, but the Messiah was God’s first creation, and hence less than the Father. Arians believe that Jesus was created by the Father at the very beginning of creation, before anything else was created, even before the worlds began.
D.W. Hull said, "The doctrine which we propose to examine [trinitarianism], was established by the Council of Nice, A.D. 325, and ever since that period, persons not believing this peculiar tenet, have been denounced by popes and priests, as dangerous heretics. It was for disbelief in this doctrine, that the Arians were anathematized in A.D. 513. As we can trace this doctrine no farther back than the origin of the ‘Man of Sin’ and as we find this dogma at that time established rather by force, than otherwise, we claim the right to investigate the matter, and ascertain the bearing of Scripture on this subject" (D.W. Hull, "Bible Doctrine of Divinity," Review and Herald, November 10, 1859, p. 193).
Uriah Smith, perhaps the most famous Adventist writer of the 19th Century, said, "But respecting this Spirit, the Bible uses expressions which cannot be harmonized with the idea that it is a person like the Father and the Son. Rather it is shown to be a divine influence from them both, the medium which represents their presence and by which they have knowledge and power through all the universe, when not personally present" (Uriah Smith, "In the Question Chair," Review and Herald, LXVII, October 28, 1890, p. 664). In commenting on Revelation 3:14-22, Smith wrote that he believed that the Messiah was "the first created being" by God the Father (Uriah Smith, Thoughts Critical and Practical on the Book of Revelation, Battle Creek, Michigan: Steam Press of the Seventh-day Adventist Publishing Association, 1865, p. 59).
Adventist historian J.N. Loughborough wrote, "What serious objection is there to the doctrine of the Trinity? There are many objections which we might urge, but on account of our limited space we shall reduce them to the three following: 1. It is contrary to common sense. 2. It is contrary to Scripture. 3. Its origin is Pagan and fabulous" (J.N. Loughborough, "Questions for Bro. Loughborough," Review and Herald, XVIII, November 5, 1861, p. 184).
J.H. Waggoner wrote, "Surely, we say right, that the doctrine of the Trinity degrades the Atonement, by bringing the sacrifice, the blood of our purchase, down to the standard of Socinianism [denial of the divinity of Jesus]. . . .the Word was God, and also the Word was with God. Now it needs no proof—indeed it is self-evident that the Word as God, was not the God whom he was with. And as there is but ‘one God,’ the term must be used in reference to the Word in a subordinate sense, which is explained by Paul’s calling the same pre-existent person the Son of God" (J.H. Waggoner, The Atonement, Oakland, California: Pacific Press, 1884, pp. 174, 153).
Socinianism, another form of Anti-Trinitarianism, says that Jesus did not pre-exist before His human birth, and had no part in the creation of man. Adventist researcher Jonathan Ross says that the Church of God, 7th Day (Meridian, Idaho group) is Socinian, as well as the House of Yahweh in Odessa, Texas, and the Church of God, Abrahamic Faith (Oregon, Illinois).
The Seventh-day Adventist 1889 Yearbook, under the article, "The Godhead," states, "That there is one God, a personal, spiritual Being, the Creator of all things, omnipotent, omniscient, and eternal, infinite in wisdom, holiness, justice, goodness, truth, and mercy; unchangeable, and everywhere present by His representative, the Holy Spirit. That there is one Lord Jesus Christ, the Son of the eternal Father, the One by whom He created all things, and by whom they do exist."
According to John Kiesz (personal interview, April 1991), Adventist leader James White ridiculed the idea of the Trinity, but his wife, Ellen G. White, was a closet Trinitarian. After the 1880’s, the Seventh-day Adventists underwent a doctrinal change regarding the teaching of the Trinity. The 1931 Yearbook says something quite different from statements of the pioneers, who were by this time deceased: "That the Godhead, or Trinity, consists of the Eternal Father, a personal, spiritual Being, omnipotent, omniscient, infinite in wisdom and love; The Lord Jesus Christ, the Son of the Eternal Father, through whom all things were created and through whom the salvation of the redeemed hosts will be accomplished; The Holy Spirit, the third person of the Godhead, the great regenerating power in the work of redemption. That Jesus Christ is very God, being of the same nature and essence as the Eternal Father." And in 1980, the second point of the "Fundamental Beliefs of Seventh-day Adventists" states, "2. THE TRINITY—There is one God: Father, Son, and Holy Spirit, a unity of three co-eternal Persons. God is immortal, all-powerful, all-knowing, above all, and ever present. He is infinite and beyond human comprehension, yet known through His self-revelation. He is forever worthy of worship, adoration, and service by the whole creation."