And it came to pass a long time after that the LORD had given rest unto Israel from all their enemies round about, that Joshua waxed old and stricken in age. And Joshua called for all Israel, and for their elders, and for their heads, and for their judges, and for their officers, and said unto them, “I am old and stricken in age: and ye have seen all that the LORD your God hath done unto all these nations because of you; for the LORD your God is He that hath fought for you. Behold, I have divided unto you by lot these nations that remain, to be an inheritance for your tribes, from Jordan, with all the nations that I have cut off, even unto the great sea westward. And the LORD your God, He shall expel them from before you, and drive them from out of your sight; and ye shall possess their land, as the LORD your God hath promised unto you.
“Be ye therefore very courageous to keep and to do all that is written in the book of the law of Moses, that ye turn not aside therefrom to the right hand or to the left; that ye come not among these nations, these that remain among you; neither make mention of the name of their gods, nor cause to swear by them, neither serve them, nor bow yourselves unto them: but cleave unto the LORD your God, as ye have done unto this day. For the LORD hath driven out from before you great nations and strong: but as for you, no man hath been able to stand before you unto this day. One man of you shall chase a thousand: for the LORD your God, He it is that fighteth for you, as He hath promised you. Take good heed therefore unto yourselves, that ye love the LORD your God.”
Joshua 23:1-11
possess the land
Adding and Taking Away
“Now therefore hearken, O Israel, unto the statutes and unto the judgments, which I teach you, for to do them, that ye may live, and go in and possess the land which the LORD God of your fathers giveth you. 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.” Deuteronomy 4:1-2 (KJV)
Learning mathematics is a good thing for helping one deal with life situations; such as financial matters, building equations, and such other things. However, addition to the word of God, or the taking away from it is a dangerous matter.
When Jeremiah the prophet was told to deliver the word of God he was told,
“Thus saith the LORD; Stand in the court of the LORD’S house, and speak unto all the cities of Judah, which come to worship in the LORD’S house, all the words that I command thee to speak unto them; diminish not a word…” Jeremiah 26:2
When people, preachers, prophets, add to the word of God, and His commandments it is cheapened giving undue authority to the one adding to it. The Christian has no authority above that which God has given us. To diminish from the word of God withholds from those who need to hear it, those things that are diminished.
We have assurance from Jesus, that no matter what man may do with the word of God;
“Heaven and earth shall pass away, but My words shall not pass away.” Matthew 24:35
And in the final analysis we find John the apostle inspired by Jesus and the Holy Spirit warning us:
“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: 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.” Revelation 22:18-19
Though these verses are written for the Revelation, I do not think it would be in error to say it involves the whole of the Word of God.
As followers of Jesus Christ we must hear only what God says; and teach only what He says. The words of men do not have the same authority.