What is The difference between Mormonism and Christianity?
A Clear Comparison With Biblical Evidence
Introduction
In today’s world, it’s common to hear the claim that “Mormons are Christians too” because they talk about Jesus, mention the Bible, and live morally upright lives. But beneath the surface, Mormonism (officially known as The Church of Jesus Christ of Latter-day Saints, or LDS) is fundamentally different from biblical Christianity. It teaches doctrines, practices, and beliefs that contradict the clear teaching of the Bible. This blog will carefully compare the two belief systems, laying out solid evidence from Scripture, history, and logic to show why Christianity stands as the truth and Mormonism is a man-made, confused religion.
1. The View of God: One God vs. Many Gods
Biblical Christianity:
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The Bible teaches that there is only one God — eternal, unchanging, and uncreated.
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Isaiah 43:10 — “Before me no god was formed, nor shall there be any after me.”
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Deuteronomy 6:4 — “Hear, O Israel: The LORD our God, the LORD is one.”
Mormonism:
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Teaches that God the Father was once a man on another planet who became a god.
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Teaches that humans can also become gods (a doctrine called exaltation).
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LDS teaching (Joseph Smith, King Follett Discourse): “God himself was once as we are now, and is an exalted man.”
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Doctrine and Covenants 132:20 — Mormons can become gods and have their own worlds.
Why Christianity is right:
The Bible is crystal clear:
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Malachi 3:6 — “For I the LORD do not change.”
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Numbers 23:19 — “God is not man, that he should lie, or a son of man, that he should change his mind.”
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God has always been God. He did not “become” God, and humans will never become gods (Isaiah 43:10 explicitly rejects this).
2. The View of Jesus: Eternal Son vs. Spirit-Brother of Lucifer
Biblical Christianity:
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Jesus is eternally God, co-equal and co-eternal with the Father.
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John 1:1 — “In the beginning was the Word, and the Word was with God, and the Word was God.”
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Colossians 1:15-17 — Jesus created all things and holds all things together.
Mormonism:
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Teaches that Jesus is the literal spirit-child of God the Father and one of His wives.
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Teaches that Jesus and Lucifer (Satan) are “spirit-brothers.”
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LDS Teaching (Gospel Principles, p. 17) — “The first spirit born to our heavenly parents was Jesus Christ.”
Why Christianity is right:
The Bible shows Jesus is the eternal, uncreated God:
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Colossians 2:9 — “For in him the whole fullness of deity dwells bodily.”
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Hebrews 13:8 — “Jesus Christ is the same yesterday and today and forever.”
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Jesus is creator, not a created being. To say He is Satan’s brother diminishes His eternal nature and divinity.
3. Scripture: The Bible Alone vs. Multiple Scriptures
Biblical Christianity:
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The Bible alone is God’s perfect, complete Word.
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2 Timothy 3:16-17 — “All Scripture is breathed out by God…”
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Jude 1:3 — “I found it necessary to write appealing to you to contend for the faith that was once for all delivered to the saints.” (Faith delivered once for all, not added to later).
Mormonism:
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Uses four standard works:
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The Bible (only “as far as it is translated correctly”)
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Joseph Smith claimed these additional books were needed because the Bible was allegedly corrupted.
Why Christianity is right:
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Jesus affirms the reliability of Scripture: John 17:17 — “Sanctify them in the truth; your word is truth.”
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Archaeological evidence (Dead Sea Scrolls, 1947) confirms that the Old Testament is reliably preserved.
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The New Testament manuscripts (over 5,800 Greek copies) show 99.5% accuracy, far more than any ancient text.
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No evidence exists to show the Bible was “corrupted.” Joseph Smith’s claim lacks historical support.
4. Salvation: Grace Alone vs. Works + Grace + Temple Ceremonies
Biblical Christianity:
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We are saved by grace through faith alone — not by works.
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Ephesians 2:8-9 — “For by grace you have been saved through faith… not a result of works, so that no one may boast.”
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Titus 3:5 — “He saved us, not because of works done by us in righteousness…”
Mormonism:
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Teaches that we are saved by a combination of grace and works.
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2 Nephi 25:23 (Book of Mormon) — “For we know that it is by grace that we are saved, after all we can do.”
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Requires temple ceremonies, baptism for the dead, and other ordinances.
Why Christianity is right:
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The Bible warns that adding works to grace nullifies grace.
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Galatians 2:21 — “If righteousness were through the law, then Christ died for no purpose.”
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Salvation is fully completed by Christ’s work on the cross (John 19:30 — “It is finished”).
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Paul rebuked adding works clearly: Galatians 1:8-9 — “If anyone is preaching to you a gospel contrary to the one you received, let him be accursed.”
5. Prophets and Revelation: Jesus is Final vs. Modern Prophets Can Change Doctrine
Biblical Christianity:
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Jesus is the final revelation of God.
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Hebrews 1:1-2 — “In these last days he has spoken to us by his Son.”
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Revelation 22:18-19 warns against adding to Scripture.
Mormonism:
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Teaches that modern LDS prophets receive ongoing revelation that can alter doctrine.
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Example: Polygamy was once required (Doctrine & Covenants 132), but later banned in 1890 to gain statehood.
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The priesthood ban on black men was lifted in 1978 after societal pressure.
Why Christianity is right:
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God does not contradict Himself (Numbers 23:19).
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Changing core doctrines (like polygamy or who can hold priesthood) shows man-made leadership, not God’s eternal truth.
6. Heaven: One Heaven vs. Three Levels of Heaven
Biblical Christianity:
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The Bible teaches that there is one heaven — the dwelling place of God — where believers go after death.
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All people face one judgment and are either eternally with God or eternally separated from Him (heaven or hell).
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Hebrews 9:27 — “It is appointed for man to die once, and after that comes judgment.”
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John 14:2-3 — Jesus promised to prepare a place for believers in His Father’s house (singular, not multiple levels).
Mormonism:
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Teaches three levels of heaven:
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Celestial Kingdom — For faithful Mormons who receive temple ordinances and keep commandments (where they may become gods).
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Terrestrial Kingdom — For good people who did not accept Mormonism.
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Telestial Kingdom — For the wicked, but still a place of some glory.
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Doctrine and Covenants 76 outlines this tiered view.
Why Christianity is right:
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The Bible never teaches three heavens as eternal destinations. It mentions “the heavens” in terms of the sky and the spiritual realm, but not as three different kingdoms of afterlife glory.
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Matthew 25:46 — “And these will go away into eternal punishment, but the righteous into eternal life.” (Two destinations only).
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Adding levels of heaven contradicts Jesus’ clear teaching of eternal life or eternal punishment.
7. The Nature of Man: Fallen and Needing Redemption vs. Eternal Spirit-Children of God
Biblical Christianity:
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Humans are created beings, not eternal spirit-children of God.
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We are made in God’s image (Genesis 1:27), but we began at conception.
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Psalm 139:13 — “For you formed my inward parts; you knitted me together in my mother’s womb.”
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All have sinned and fall short of the glory of God (Romans 3:23).
Mormonism:
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Teaches that all humans existed as spirit-children of Heavenly Father and His wives before being born on Earth.
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Earth life is a test to progress toward godhood.
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Gospel Principles, p. 11 — “We are literal spirit children of heavenly parents.”
Why Christianity is right:
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The Bible nowhere teaches “pre-mortal existence.”
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Zechariah 12:1 — God forms the human spirit within a person, not before birth.
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Pre-mortal spirit doctrine comes from man-made speculation, not Scripture.
8. The Temple: Fulfilled by Christ vs. Necessary for Salvation
Biblical Christianity:
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The Old Testament temple pointed to Jesus, who fulfilled its purpose.
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Through Jesus’ sacrifice, there is no longer a need for a temple or temple ordinances.
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Hebrews 10:19-20 — “We have confidence to enter the holy places by the blood of Jesus, by the new and living way.”
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1 Corinthians 6:19 — “Your body is a temple of the Holy Spirit.”
Mormonism:
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Teaches that temple ordinances (like endowments, baptisms for the dead, eternal marriage) are essential for exaltation.
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Requires secret ceremonies derived from Freemasonry (historically verifiable — Joseph Smith joined Freemasonry in 1842 and soon introduced LDS temple rites).
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Doctrine and Covenants 131:1-4 — Eternal marriage is required for exaltation in the Celestial Kingdom.
Why Christianity is right:
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The temple veil was torn at Jesus’ death (Matthew 27:51), showing full access to God through Christ alone.
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The New Testament never commands temple ordinances for Christians.
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Hebrews 8–10 explains the old covenant temple is obsolete because of Jesus’ perfect sacrifice.
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LDS temple requirements contradict the Gospel of grace and are man-made additions.
9. Authority and Leadership: Christ Alone vs. LDS Priesthood
Biblical Christianity:
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Jesus is our sole High Priest forever.
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Hebrews 4:14 — “We have a great high priest who has passed through the heavens, Jesus, the Son of God.”
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All believers are a royal priesthood (1 Peter 2:9).
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There is no need for a restored priesthood because Jesus is the final mediator.
Mormonism:
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Teaches that the true priesthood authority was lost after the apostles died and was restored to Joseph Smith in 1829.
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Divides priesthood into Aaronic and Melchizedek priesthood offices.
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Claims LDS Church is the only church with true priesthood authority.
Why Christianity is right:
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The Bible shows the Melchizedek priesthood is eternal and belongs to Christ alone (Hebrews 7:24 — “He holds his priesthood permanently”).
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There is no biblical evidence of a total apostasy or loss of priesthood authority.
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Matthew 16:18 — “I will build my church, and the gates of hell shall not prevail against it.” (Jesus promised His Church would never disappear).
10. Prophecy and Historical Evidence: Fulfilled Prophecy vs. Failed Prophecies
Biblical Christianity:
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The Bible contains hundreds of fulfilled prophecies — many confirmed historically:
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Jesus’ birth in Bethlehem (Micah 5:2, fulfilled Luke 2:4-7)
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The destruction of Jerusalem (Luke 21:6, fulfilled AD 70)
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Cyrus named as ruler before his birth (Isaiah 45:1)
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Deuteronomy 18:22 — “When a prophet speaks in the name of the LORD, if the word does not come to pass… it is a word that the LORD has not spoken.”
Mormonism:
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Joseph Smith made false prophecies, showing he was not a true prophet.
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Doctrine and Covenants 84:4-5 — Prophesied that a temple would be built in Missouri in “this generation” (by ~1890). No temple was ever built there.
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Prophesied that the U.S. Civil War would lead to a worldwide war (Doctrine & Covenants 87). This did not happen.
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Claimed Jesus would return by 1891 (History of the Church 2:182). Did not happen.
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Why Christianity is right:
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Joseph Smith fails the biblical test of a prophet.
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Jesus and the Bible’s prophecies are consistently accurate and historically verified.
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Isaiah 46:9-10 — “I am God… declaring the end from the beginning.” Only the God of the Bible knows and declares future events perfectly.
Final Thoughts
When weighed carefully, Mormonism shows every hallmark of a man-made, confused religion:
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Contradicting Scripture
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Changing doctrines
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Adding human works
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False prophecies
Biblical Christianity is rooted in historical facts, fulfilled prophecies, and the unchanging Word of God. It offers the true Gospel: salvation by grace alone through faith alone in Christ alone.
“For no prophecy was ever produced by the will of man, but men spoke from God as they were carried along by the Holy Spirit.” — 2 Peter 1:21
I encourage every reader — compare the evidence, pray to the one true God revealed in the Bible, and trust in Jesus Christ alone for salvation.
Conclusion: Why Christianity Stands True
The Bible stands alone as a historically reliable, logically consistent, and spiritually complete revelation of God. Mormonism, despite its moral appearance and family emphasis, contradicts the Bible in nearly every major doctrine — the nature of God, the identity of Jesus, the plan of salvation, and the authority of Scripture.
Christianity teaches one eternal, holy God.
Mormonism teaches countless gods.
Christianity teaches salvation by faith through grace alone.
Mormonism teaches salvation by works and ceremonies.
Christianity teaches Jesus is eternal God and Creator.
Mormonism teaches Jesus is a created spirit-brother of Lucifer.
These are not small differences — they are eternal, salvation-level differences.
Jesus warned:
“For false Christ's and false prophets will arise and perform great signs and wonders, so as to lead astray, if possible, even the elect.” — Matthew 24:24
Mormonism fits exactly what Jesus warned about. Christianity is not man-made — it is anchored in history, fulfilled prophecy, and the unchanging Word of God.
If you are seeking truth, stick to the Bible alone, trust in Jesus Christ alone, and rest in God’s grace alone.
Call to Action:
If you are a Mormon or have Mormon friends, I encourage you to carefully compare these scriptures yourself. Pray and ask the God of the Bible to reveal truth to you. Jesus said:
“You will know the truth, and the truth will set you free.” — John 8:32