Additional Scripture
Mormons believe that God wants His children today to have an additional Scripture – The Book of Mormon. In order to justify their un-biblical beliefs (many gods, God was once a man, man can be come a god, add works to salvation…etc.), Mormons have undermined the authority and the reliability of the Bible.
Did Jesus say that the believers at the end of time will need an additional Scripture? No. The night before Jesus’ crucifixion, Jesus promised His apostles that after His departure, the Spirit would come and guide them “into all truth” (John 16:13), teaching them “all things,” and bringing to their remembrance “all things” that Jesus taught them (John 14:26).
And after His crucifixion and resurrection, Jesus then commanded these same disciples to “make disciples of all the nations…teaching them to observe all things that I have commanded you” (Matthew 28:19-20). The fact is, “the faith…was once for all delivered to the saints” in the first century (Jude 3), so since that time Christians have had “all things that pertain to life and godliness” (2 Peter 1:3). Since then, “the man of God” has been “complete, thoroughly equipped for every good work” (2 Timothy 3:16-17).
The Bible recorded the teachings of Jesus, the apostles and the prophets for our benefit (Ephesians 3:1-5). Therefore, Christians, today, should be content with the powerful “sword of the Spirit” (Ephesians 6:17; Hebrews 4:12) and be warned to “not believe every spirit, but test the spirits, whether they are of God; because many false prophets have gone out into the world” (1 John 4:1).
The Book of Mormon contains numerous passages that contradict what the Bible says. For more on that, check the following link: https://bibleask.org/does-the-book-of-mormon-contradict-the-bible/
To those who seek a new scripture, Paul warns saying, “I marvel that you are turning away so soon from Him who called you in the grace of Christ, to a different gospel, which is not another; but there are some who trouble you and want to pervert the gospel of Christ. But even if we, or an angel from heaven, preach any other gospel to you than what we have preached to you, let him be accursed. As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed” (Galatians 1:8-9).
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In His service,
BibleAsk Team