Deuteronomy 4:2 Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.
It is truly God’s Word:
Various Scriptures declare that the Bible is authored by God – Moses wrote what God told him to say and wrote to the people (Lev 1:1). Jeremiah spoke and wrote what God told him (Jer 1:4). John wrote what he was instructed to write as given to him from the resurrected Lord (Rev 1:1). Paul wrote that all Scripture is breathed out by God (2 Tim 3:16). Paul also told the Thessalonian believers that they were receiving and believing the very word of God (1 Thes 2:13). If we try to say that portions of the Bible are untrue or myths, then we have to say the whole is that way, because it is declared to be wholly given by inspiration – God-breathed.
Warning about the Word of God:
God gives us four such warning about tampering with His word.
Deut 4:2 – Adding to God’s word by saying more than it says – Eve did this somewhat when she said, “neither shall ye touch it” in referring to the forbidden fruit. Diminishing from it would be similar to Eve’s saying “lest ye die”; God said, “ye shall surely die”. Later in Deut 12:32 -- “Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.” God reiterated the former command only this time in reference to false gods and the way people committed abominations to them – sacrifice of children and prostitution.
Rev 22:18-19 – “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: 19 And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.” God presented an even greater pronouncement against anyone adding to or taking away from His word. Here He declares that He will add the plagues of the book to them and take their names out of the book of life and also their part (home) in heaven. Then He adds that He will also take away other things written in His book – probably the blessings and promises. This warning would also be relevant to anyone who would claim to have a new revelation from God that would lead people differently from His word, perhaps adhering g to another book supposedly given by that new revelation. Notice, God was careful to say the “words” not the concept of His written word.
Prov 30:5-6 – “ Every word of God is pure: he is a shield unto them that put their trust in him. 6 Add thou not unto his words, lest he reprove thee, and thou be found a liar.” Near the middle of the Bible is a warning to any who would try to discredit God’s word. God says that anyone that tries to discredit His word, they will be proved a liar and be ashamed. Such has been the case with people who have tried to disprove the Bible in the past and thus it will be for those in the present and future. i.e. cities of Sodom and Gomorrah; the rise of Russia as a powerful nation; the return of Christ, evolution versus creation and etc. The Bible is God’s love letter to us (mankind) and we all would do well to read, believe, receive and study it consistently.