What does the Bible say about adding to or taking away from God's Word?

In Deuteronomy 4:2, God clearly instructs Israel, saying, 'Ye shall not add unto the word which I command you, neither shall ye diminish ought from it.' This command serves as a stern warning against hermeneutical eisegesis, which is the practice of interpreting Scripture according to personal ideas or opinions rather than adhering to the text itself. To add or take away from the Word of God is not merely a misinterpretation; it's considered a sin that misrepresents God’s true intentions. It is crucial for believers to recognize the seriousness of this command because altering God's Word undermines its authority and misleads others into error.