I don't suggest anything. Notice that it was Scripture that answered you, not me. Scripture defines Scripture. The answers are there.

Your question: "Are you suggesting that I should never talk about what God means unless I have a verbatim quote from the Bible to back up what I say?"

Scripture's answer: Deut.4 (as already given)

[2] Ye shall not add unto the word which I command you, neither shall ye diminish ought from it

And

Rev.22

[18] 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.

With those two strong admonitions (and there are others), any man should easily understand the seriousness of God's word, and the seriousness of misrepresenting it.

With that said, I will attempt to show you what the scripture demonstrates that is allowed: Pss.17[2] ..... the things that are equal.

What things "are equal?"

Matthew 5 [28] states that to look on a woman with lust is adultery. So lust = adultery.

1John.3 states:

[15] Whosoever hateth his brother is a murderer.  So hatred = murder. 

Col.3[5] states that covetousness is idolatry. So covetousness = idolatry.

Beyond the license of "equal" the scripture states explicitly the care that MUST be taken when using the scriptures. See the above warnings, and search out the many others. This is not a joke. Salvation depends on it. And if others are misled to their destruction by publication of false doctrine, who is responsible? Jesus answers that in his word also. GREAT CARE is to be taken. I hope this helps.