Mormonism vs. Biblical Christianity: 6 Major Differences

Mormons are some of the nicest people you’ll ever meet. They are kind, conservative, moral, hardworking, and open about their faith. I have Mormon friends I dialogue with regularly about life, family, and occasionally, the strong differences we hold regarding faith, works, and what we define as “Scripture” and truth. I don’t provide you with this contrast between Mormonism and biblical Christianity to weaponize animosity towards Mormons, but to provide those who would identify as “evangelical Christians” with clarity. Mormons in your life should be evangelized, loved, and treated as those outside of the only faith that leads to salvation. Because their religion is founded upon a works-based redemption, along with errant views of Christ, we must refuse cowardice and discomfort, along with faulty ideas like, “Mormons are Christians too!” No, Mormons are Mormons. Therefore, in line with what Christ has called us to do as salt and light, we must seek to reach them with the truth. 

There are several key differences between Mormonism and biblical Christianity. You can add more to this list, but this should provide you with a very strong foundation for understanding and conversation. Each key difference is broken up into the LDS view, the biblical view, and why it matters. 

1. Authority: Additional revelation vs. the sufficiency of Scripture 

LDS view: The LDS Articles of Faith say, “We believe the Bible to be the word of God as far as it is translated correctly; we also believe the Book of Mormon to be the word of God.” They also affirm ongoing revelation saying, “we believe that He will yet reveal many great and important things.” The Book of Mormon introduction calls it “a volume of holy scripture comparable to the Bible,” and official LDS teaching includes the Bible, Book of Mormon, Doctrine and Covenants, and Pearl of Great Price as “the standard works.” 

Biblical Christianity: Scripture is God-breathed, sufficient, and once-for-all delivered to the saints (2 Timothy 3:16–17; Jude 3). Biblical Christianity does not place later books or latter-day prophets alongside Scripture as additional binding revelation.

Why This Matters: Mormons have an unbiblical view of the doctrine of revelation that goes against Scripture. This means our differences are not over a few minor disagreements on interpretation. It is that they have an entirely different doctrine of revelation. 

2. God: The eternal, uncreated Creator vs. an exalted man

LDS view: Joseph Smith’s King Follett discourse, preserved on the Church’s own history site, teaches that God “was once as one of us.” Official LDS instructional material also preserves the fuller statement which reads, “God Himself was once as we are now, and is an exalted man.”  Lorenzo Snow’s famous couplet, published by the LDS Church, says: “As man now is, God once was: As God now is, man may be.” Snow was the 5th President of the LDS. Doctrine and Covenants 130:22 adds, “The Father has a body of flesh and bones as tangible as man’s.” Official LDS Gospel Topics repeats that statement as a description of the Father. 

Biblical Christianity: God is eternally God. There is none before Him and none after Him (Isaiah 43:10). He does not change (Malachi 3:6). He is Spirit (John 4:24), the uncreated Creator of all things (Genesis 1:1; Psalm 90:2).

Why This Matters: Biblical Christianity teaches that God is categorically distinct from creation. Mormonism collapses that distinction and this leads to a heretical view of God. 

3. The Trinity: Three separate beings vs. one God in three persons

LDS view: Official LDS Gospel Topics states, “These three beings make up the Godhead.” It also teaches that they “preside over this world and all other creations.” Seminary material from the LDS Church explains that “there are three separate personages in the Godhead,” and that the Father and Son have “glorified bodies of flesh and bone.” 

Biblical Christianity: There is one God (Deuteronomy 6:4; Isaiah 45:5). The Father is God, the Son is God, and the Spirit is God, yet God is one being in three persons (Matthew 28:19; John 1:1; Acts 5:3–4; 2 Corinthians 13:14).

Why This Matters: The Christian doctrine of the Trinity is not three gods united in purpose. It is one God, eternally existing in three persons. Mormonism rejects that doctrine.

4. Jesus Christ: The eternal Son of God vs. a spirit child within a larger heavenly family

LDS view: Official LDS teaching says that in premortality “all people lived with God as His spirit children.” It also says, “Lucifer, another spirit son of God, rebelled.” Official LDS material explains that “all intelligent beings were created by God and are His spirit children,” while “Christ alone” is the Savior.  A BYU Religious Studies Center article describes the premortal conflict by saying the Father “chose Christ as the Redeemer and rejected Lucifer,” and refers to those involved as “spirit brothers and sisters.” Another LDS seminary source states, “Lucifer, our spirit brother, opposed the plan,” while “Jehovah” sustained it. 

Biblical Christianity: Jesus is not one spirit child among many. He is the eternal Word who “was with God” and “was God” (John 1:1). He is the uncreated Son through whom “all things came into being” (John 1:3). He is before all things (Colossians 1:16–17). He is not a created being, and He is not ontologically part of the same class of beings as Satan.

Why This Matters: Once Christ is reduced from eternal Creator to a being within creation, you no longer have the Christ of Scripture. This is Christological heresy, and blatantly anti-Scripture. This difference alone is enough to classify Mormonism as “heresy” and a completely different religion and different gospel altogether. The Jesus of Mormonism is a different Jesus than that of the Bible. 

5. Salvation: Grace after obedience and ordinances vs. grace alone through faith alone

LDS view: Article of Faith 3 says that through Christ’s atonement “all mankind may be saved, by obedience to the laws and ordinances of the Gospel.” 2 Nephi 25:23 states, “it is by grace that we are saved, after all we can do.” Official LDS teaching materials continue to explain salvation in those terms, saying eternal life comes “if we do our part,” including faith, repentance, baptism, other ordinances, and enduring to the end.  The LDS Church’s General Handbook defines exaltation as becoming like God and living in His presence eternally, and links that destiny to covenantal obedience and ordinance-centered progression. 

Biblical Christianity: The gospel announces that sinners are justified by grace alone through faith alone in Christ alone, not by works, ordinances, or personal worthiness (Ephesians 2:8–9; Romans 3:28; Titus 3:5; Galatians 2:16). Good works follow salvation; they do not help secure it (Ephesians 2:10).

Why This Matters: The difference here is not merely emphasis. Mormonism conditions final salvation and exaltation on obedience and ordinances. Biblical Christianity rests on the finished work of Christ alone.

6. Man’s Destiny: Glorified worshipers vs. men becoming gods

LDS view: Official LDS Gospel Topics says, “each of us has the potential to become like our Heavenly Father.” Gospel Principles teaches, “We could become like Him, an exalted being.” The General Handbook defines “eternal life, or exaltation” as “to become like God.” Doctrine and Covenants 132:20 says of the exalted, “then shall they be gods.” 

Biblical Christianity: Believers are glorified, conformed to Christ, and brought into everlasting fellowship with God (Romans 8:29–30; 1 John 3:2). But they never become gods. God declares, “Before Me there was no God formed, and there will be none after Me” (Isaiah 43:10).

Why This Matters: Christian glorification is not deification into godhood. The Creator-creature distinction remains forever.

LDS doctrine uses Christian vocabulary, but it redefines the terms. It speaks of God, Christ, grace, salvation, scripture, and heaven, but the content attached to those words is different. LDS official sources teach additional scripture, ongoing prophetic revelation, a God who “was once as one of us,” a Godhead of separate beings, salvation tied to ordinances and obedience, and exaltation into godhood. Biblical Christianity teaches one eternal God, one sufficient Scripture, one uncreated Christ, and one gospel of grace for helpless sinners.

It is upon these clear differences that any Christian would say that Mormonism is not a Christian denomination with a few unusual distinctives. It is a different theological system with a different authority, a different God, a different Christ, a different gospel, and a different view of salvation.

Every Christian should pray for the lost, seek to reach the lost, and show love to the lost by telling them the truth. This includes our Mormons friends, neighbors, co-workers, and family.