“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.