The LDS Church teaches that Joseph Smith received consistent, coherent revelation from God from his First Vision in 1820 until his death in 1844. But a careful reading of his own writings and discourses — in chronological order — reveals something striking: his doctrine of God underwent distinct, mutually contradictory phases. The God of the 1830 Book of Mormon is not the God of the 1843 D&C. The God of the 1835 Lectures on Faith is not the God of the 1844 King Follett Discourse. And remarkably, Smith's own "inspired" Bible translation (1830–33) reinforces the early modalist view with even stronger language — language he would later abandon entirely. These are not refinements of the same idea. They are categorical theological reversals — each delivered as divine revelation.
✦ The Unavoidable Conclusion ✦
If the God of the 1830 Book of Mormon is the true God, then the King Follett Discourse is false revelation. If the King Follett Discourse reveals the true God, then the Book of Mormon's declaration that God is "unchangeable from all eternity to all eternity" is wrong. And if the Lectures on Faith were true in 1835, then both are wrong in different ways. The Joseph Smith Translation makes the problem even more acute: as late as 1833, Smith was still actively writing — under claimed prophetic inspiration — that "the Son is the Father, and the Father is the Son" and that the Mediator "is one God." These are not inherited texts. They are his own "corrections." An authentic prophetic channel does not produce irreconcilable contradictions about the fundamental nature of the being it claims to represent.
The Catholic Church has never changed what it teaches about who God is. The same God confessed by Peter and Paul, articulated by Justin and Irenaeus, defined at Nicaea, is the God worshipped at every Mass today. That consistency across twenty centuries is itself a theological argument.