Do Not Add To Scripture

"For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book." (Revelation 22:18)

This sober warning almost at the end of the Bible was given by the glorified Lord Jesus Himself (note v. 20), so should be taken very seriously.

The Bible is not just a great book. It is The Book! Its content had been "for ever . . . settled in heaven" (Psalm 119:89) but had been gradually transmitted to men on Earth through God-called prophets, whose writings were "given by inspiration of God"—that is, literally "God-breathed" (2 Timothy 3:16). "God . . . at sundry times and in divers manners spake in time past unto the fathers by the prophets" (Hebrews 1:1).

Finally, the New Testament was given through Paul and others "by revelation . . . revealed unto his holy apostles and prophets by the Spirit" (Ephesians 3:3, 5). John was the last of the "apostles and prophets" when he wrote Revelation (all the others had been martyred), and Christ then indicated (see text above) that nothing more could be added, not just to John's obviously finished book of Revelation, but really to the now-completed body of inspired Scripture from Genesis to Revelation...Read article.

Other verses which also say the same thing:

Deu 12:32  "Everything that I command you, you shall be careful to do. You shall not add to it or take from it. 

Pro 30:6  Do not add to His words, lest He rebuke you and you be found a liar.

Those who think they are getting extra-biblical prophecies, visions, or "words from God" are earning His judgment upon them. HE is not to be trifled with. Scripture is complete. There is nothing missing, nothing God forgot or omitted that we NEED (remember the Serpent's claim to Eve in the Garden of Eden?). Scripture is fully complete in and of itself to supply us with all we need for "life and godliness", making us "competent for every good work". All of God's Word is authoritative. To claim He still gives His word today is either to deny the full authority of the completed Scriptures, or to give full authority to supposed "words" from God today. Either way, both cannot be simultaneously true and both positions are wrong.