Rev 1:6 And unto him who loved us be glory, who washed us from our sins in his own blood and hath made us kings and priests unto God, his Father. To him be glory and dominion forever and ever. Amen.
Joseph Smith Translation
He also taught the Godhead was three gods when his pre-1836 canon taught ONE GOD
Question: "May I raise a question about one of your statements? You state that in the year A.D. 325 the bishops of the church 'rejected the God of Abraham, Isaac, and Jacob, and substituted the Athanasian Creed.' For me this statement needs clarification. May I inquire in what respect 'the God of Abraham, Isaac, and Jacob' differs from the God as stated in the Athanasian Creed?"
Answer: The God of Abraham came down to visit Abraham and instruct him on several occasions, as he did likewise to others of the prophets. So Abraham became acquainted with our Heavenly Father and knew him. All I need to do to show that the God of Athanasius is not the God of Abraham is to refer to three points.
If you know Joseph Fielding Smith had taught it was Jesus who walk and talked with Abraham
And they shall teach no more every man his neighbour, and every man his brother, saying: Know the Lord: for all shall know me from the least of them even to the greatest, saith the Lord: for I will forgive their iniquity and I will remember their sin no more. (Jeremias 31:34. (All references for this answer are quoted from Challoner's Authorized Catholic Bible. Same references can be checked in the King James Version.))
Now this is everlasting life, that they may know thee, the only true God, and him whom thou hast sent, Jesus Christ. (John 17:3.)
The Bible and Book of Mormon are clear God is incomprehensible
Great is the Lord, and greatly to be praised, and his greatness is unsearchable. (Ps. 145:3)Behold, these are but the outskirts of his ways, and how small a whisper do we hear of him! But the thunder of his power who can understand? (Job 26:14)For my thoughts are not your thoughts, neither are your ways my ways, declares the Lord. For as the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts. (Isa. 55:8–9)Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgments and how inscrutable his ways! "For who has known the mind of the Lord, or who has been his counselor?" (Rom. 11:33–34; cf. Job 42:1–6; Ps. 139:6, 17–18; 147:5; Isa. 57:15; 1 Cor. 2:10–11; 1 Tim. 6:13–16)
SCRIPTURES ARE CLEAR ON DOCTRINE OF GODHEAD
2. The creed is at fault in stating that there are not "three Eternals" but "one Eternal," thus confounding the Father, the Son and the Holy Ghost, when the scriptures are definitely clear that the three members of the Godhead are separate and distinct from each other; each with a definite mission to perform. The Savior told his apostles that when he went away he would send them the Comforter, who is the Holy Ghost.
But the Advocate, the Holy Spirit, whom the Father will send in my name, he will teach you all things, and bring to your mind whatsoever I have said to you. (John 14:26.)
3. In the fact that the creed declares that in the Trinity, "None is greater or less than Another, but the whole Three Persons are Co-Eternal together, and Co-Equal" we find a conflict which is contrary to what is written in the scriptures. Arius, at that council, tried to establish one truth that was rejected. That is, that there never was a Son that was not younger than his Father, but the creed emphatically declares that the Son, as well as the Father, is "Uncreate."
The Creeds do tell us Jesus was inferior or subservient to the Father
And again, when he brings the firstborn into the world, he says, And let all the angels of God adore him. (Hebrews 1:6.)
If therefore we are the offspring of God, we ought not to imagine that Divinity is like gold or silver or stone, to an image graven by human art and thought. (Acts 17:27-29.)
For God so loved the world that he gave his only-begotten Son, that those who believe in him may not perish, but have life everlasting. (John 3:16.)
You have heard me say to you, if you love me, you would indeed rejoice that I am going to the Father, for the Father is greater than I. (John 14:28.)
If anyone desires to do his will, he will know of the teachings whether it is from God, or whether I speak on my own authority. (John 7:16-17.)
And when all things are made subject to him, then the Son himself will also be made subject to him who subjected all things to him, that God may be all in all. (I Corinthians 15:25-28.)
Father, if thou art willing, remove this cup from me; yet not my will but thine be done. (Luke 22:42.)
These passages are a few which show that the Athanasian Creed was not inspired by the Father, but was man-made. On the occasion there was no revelation given; nor was one sought. To the contrary, men contended, bitterness followed, and there came a division among them. They had no prophet to speak, no divine word of the Lord was received, but merely the opinions of men who lacked inspiration.