A Latter-day Saint friend of mine once invited an evangelical coworker to church. The coworker found much that was familiar in the LDS service: hymn singing, an informal sermon style, robust fellowshiping and scripture-driven Sunday school. But then came the moment when the Sunday school teacher, after beginning with Genesis, said “Let’s now turn to the Book of Moses” and began reading: “The presence of God withdrew from Moses . . . and he said unto himself: Now, for this cause I know that man is nothing, which thing I never had supposed.’” I am told that the visitor reflexively searched through his Bible before he realized that he’d never heard of such a book, though of course the story of the burning bush was familiar. And while he didn’t mind the sentiments expressed in the words he’d heard, he knew that they were not in his Bible.
This mix of the familiar and the strange is a common experience for any who have spent even minimal time with the Latter-day Saints. The greatest contributing factor to this mix is Mormonism’s dependence on and sophisticated redaction of the Bible. All of Mormonism, even its most unfamiliar tenants, rests in some element of the biblical narrative. Academics would explain this in terms of intertextuality, noting that the meanings of Mormonism, even its unique scriptures, are achieved within the larger complex of the Christian canon. You don’t need to be a scholar to recognize this. You need only open and read the first words you see in any one of Mormonism’s unique scriptures.
The Latter-day Saint canon consists of four books: the Bible and three other texts—the Book of Mormon, the Book of Doctrine and Covenants and the Pearl of Great Price. Each reads very much like the Bible in type and breadth of thematic concerns and literary forms (history, law, psalm). Even the rhetorical stance of each canon is biblical: God is speaking to prophets faced with temporal crises of spiritual significance. In terms of the authority granted these four texts, all have equal weight, including both Bible testaments, as historical witnesses to God’s promise of salvation, enacted by covenant with the Israelites and fulfilled in the atonement of Jesus Christ as the only begotten of the Father.
The LDS Church’s confidence in the authority and historicity of the Bible is mitigated only by scruples regarding the Bible’s history as a book. The Bible is “the word of God insofar as it is translated correctly.” The other three Latter-day Saint scriptures are also believed to be historical witnesses to God’s promise of salvation. Considered translations by or direct revelation to Joseph Smith, the church’s founding prophet, they are considered correct in their representation of God’s will and word, though they possibly contain flaws resulting from “the mistakes of men.” What follows is a brief description of these three texts and a few examples of how they reshape Christian tradition and influence Latter-day Saint belief and practice . . .
. . . The effect of this view on the Latter-day Saints’ identity is probably immeasurable. They believe that God has known them, as he said to Jeremiah, before they were in the womb and that they are, if faithful, predestined for glory in Pauline terms. When things get tough, as in the case of Job, the Saints are to remember the time when “the morning stars sang together” about what they believe was a loving Father’s plan for their ultimate glory. On the basis of these alternative accounts of creation and Moses’ theophany, Latter-day Saints believe that the truest measure of God’s greatness is his generativity, not his sovereignty or prescient omniscience that predestines outcomes. Thus, when they voice their Christian perfectionism in terms of becoming like God, Latter-day Saints are not aspiring to power over others. As we have seen, the primordial event in their canon’s salvation history uses Lucifer’s fate as a warning against such aspiration. Rather, they understand their divine potential in terms of parenting, even the promise of an endowment of sanctifying grace that enables the faithful to facilitate spiritual, not merely physical, birth. To obtain such generativity is, for Latter-day Saints, why humans exist, and it constitutes the deep doctrinal stratum of what is typically seen as merely a sentimental attachment to family . . .
. . . Each year in a repeating four-year cycle, one of these canonical texts is the subject of the LDS Church’s Sunday school curriculum for youth and adults. Members are expected to read the designated scripture from beginning to end. Each book of scripture is considered as essential as any other, though the Bible is given two years of this cycle, one for each testament. The Book of Moses and the Book of Abraham are treated seamlessly within the Old Testament curriculum, as was done the day my friend brought his coworker friend to class. There is no canon within a canon—only a single history of God’s efforts to be heard in all places and by every generation.
Mormons are not theologians or even particularly doctrinaire; they are primarily narrativists. They inhabit the world of the book. They read themselves into the salvation history it tells and orient themselves to the horizon created by its promises. In sum, Latter-day Saint scriptures play a definitive role in the lives of believing readers, informing them of who they are in relation to God, why they are here and where it is possible for them and their loved ones to go. In respect to this world and the next, the Saints’ scriptures give them a distinctively positive sense of human potential based on God’s capacity and desire to save them and everyone else, as it says in the Book of Mormon, “through the merits, and mercy, and grace of the Holy Messiah.”I would suggest reading the whole article. You can also read my Mormonism in a Nutshell post for another quick presentation of LDS beliefs.