The commandment and not just a good philosophical suggestion is "ye shall not"
Deuteronomy 4 King James Version (KJV) 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 (ONE) which I command you, neither shall ye diminish ought from it (One) , that ye may keep the commandments (MANY) of the Lord your God which I command you.
The warning in Revelation is in respect to the perfect. Toghter they work perfectly together to author the Holy Spirit from Plagiarism . We are to have no gods before our God .Change the meaning of one word. . . change the intent of the context.