"Ye shall not add unto the word which I command you, neither shall you diminish aught from it, that ye may keep the commandments of the LORD your God which I command you." (Deuteronomy 4:2)
Whatever you do, don't mess with the Bible - God's Holy Word!
He warns us in Deuteronomy not to "add unto the word" nor "diminish aught from it." Nowadays, we are seeing this happen more than ever. People are attributing to God words that He never spoke. They are adding comments that corrupt, weaken, or destroy what is already written.
On the one hand, you will find them making new laws of their own and joining them to the Law of God...setting them upon a level with the Word...or even prefering them before it. Or they may even add to it by committing the evil which it forbids or by adding their own opinions and inventions. On the other hand, you will find them detracting from the Word... making parts of it void... doing that which is forbidden... or neglecting what is commanded. They diminish it also by omitting the good which it requires.
In our day and time, we must be on the constant lookout for skepticism which attempts to subtract from the Word and superstition which seeks to add to it. The plan of the skeptic or the superstitious one is to get you to alter or mutilate the Word of God that you preach!
Never forget the words of Matthew Henry concerning this matter - "God's work is perfect, nothing can be put to it, nor taken from it, without making it the worse."