For over a thousand years it has been established that the Bible is the only Word of God. People know the Bible to be God’s inspired Word. “All Scripture is given by inspiration of God”. God’s Word is pure and should not be added to. Those that add to or modify the Bible, God will rebuke. “Every word of God is pure…Do not add to His words, Lest He rebuke you”. This warning is true today even though people like Joseph Smith now claim there is another gospel or book of scripture given to him by an angel. We must not be deceived for it is said, “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”. There is a verse in Revelation that says, “If anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life”. Sure, this verse may be referring to the book of Revelation but the warning here is heavy for those that modify that book.
The Bible references to the quotes above are below…
The Bible is inspired.
2 Timothy 3:16-17 (NKJV)
16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness,
17 that the man of God may be complete, thoroughly equipped for every good work.
The Bible is pure and should not be added to.
Proverbs 30:5-6 (NKJV)
5 Every word of God is pure; He is a shield to those who put their trust in Him.
6 Do not add to His words, Lest He rebuke you, and you be found a liar.
The Book of Revelation should not be added to.
Revelation 22:18-19 (NKJV)
18 For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book;
19 and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book.
Joseph Smith (First Prophet of the Mormon Church) did add to and take away from the Book of Revelation. See below (Using the KJV version of the Bible here since this was the translation Joseph Smith used when he modified it)….
Revelation 5:6 (KJV)
6 And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth.
Revelation 5:6 Joseph Smith Translation (JST)
6 And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having twelve horns and twelve eyes, which are the twelve servants of God, sent forth into all the earth
Note: in the link above it explains that 12 is used in the JST translation to mean the twelve apostles. Seven was removed and twelve was written in place of it. Since Jospeh Smith changed the book of revelation then his name was removed from the book of life like the warning said. Since this is still referred to in lds.org than it means that the Mormon church still believes in this. Anyone proclaiming to be a prophet that modifies or adds to the Bible is a false prophet.
Do not accept another gospel even if an angel preaches it.
Galatians 1:6-10 (NKJV)
6 marvel that you are turning away so soon from Him who called you in the grace of Christ, to a different gospel,
7 which is not another; but there are some who trouble you and want to pervert the gospel of Christ.
8 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.
9 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.
10 For do I now persuade men, or God? Or do I seek to please men? For if I still pleased men, I would not be a bondservant of Christ.
Do not listen to those that preach another Jesus outside the Bible.
2 Corinthians 11:3-4 (NKJV)
3 But I fear, lest somehow, as the serpent deceived Eve by his craftiness, so your minds may be corrupted from the simplicity that is in Christ.
4 For if he who comes preaches another Jesus whom we have not preached, or if you receive a different spirit which you have not received, or a different gospel which you have not accepted-you may well put up with it!