The Nicene Creed erased the anthropomorphic nature of God

“In common with the rest of Christianity, we believe in a Godhead of Father, Son, and Holy Ghost. However, we testify that these three members of the Godhead are three separate and distinct beings. We also testify that God the Father is not just a spirit but is a glorified person with a tangible body, as is his resurrected Son, Jesus Christ. . . . Many Christians reject the idea of a tangible, personal God and a Godhead of three separate beings. They believe that God is a spirit and that the Godhead is only one God. . . .The collision between the speculative world of Greek philosophy and the simple, literal faith and practice of the earliest Christians produced sharp contentions that threatened to widen political divisions in the fragmenting Roman empire. This led Emperor Constantine to convene the first churchwide council in A.D. 325. The action of this council of Nicaea remains the most important single event after the death of the Apostles in formulating the modern Christian concept of deity. The Nicene Creed erased the idea of the separate being of Father and Son by defining God the Son as being of ‘one substance with the Father.’

Other councils followed, and from their decisions and the writings of churchmen and philosophers there came a synthesis of Greek philosophy and Christian doctrine in which the orthodox Christians of that day lost the fulness of truth about the nature of God and the Godhead. The consequences persist in the various creeds of Christianity, which declare a Godhead of only one being and which describe that single being or God as ‘incomprehensible’ and ‘without body, parts, or passions.’ One of the distinguishing features of the doctrine of The Church of Jesus Christ of Latter-day Saints is its rejection of all of these postbiblical creeds. . . . Joseph Smith’s first vision showed that the prevailing concepts of the nature of God and the Godhead were untrue and could not lead their adherents to the destiny God desired for them. . . .We can comprehend the fundamentals he has revealed about himself and the other members of the Godhead. And that knowledge is essential to our understanding of the purpose of mortal life and of our eternal destiny” (Elder Dallin H. Oaks, Ensign, May 1995, 84–86).