ירמיהו, פרק כ״ג, פסוק ט״ז

A severe warning is issued to the public, urging them to close their ears to the voices of false prophets. The messages being spread offer no divine truth, serving only to create a dangerous illusion. These individuals mislead, deceive, and numb the masses with empty words that lack any real substance.

[מלבי״ם] draws a careful distinction between a simple lie and utter nonsense. It is possible for someone to speak falsely in the name of God while still offering ideas that have some practical value. However, the messages of these false prophets are both complete lies and entirely useless nonsense. This emptiness stems from the fact that their visions are completely self-generated. They invent images from their own private imaginations rather than receiving any true prophecy from God.

How are the people expected to recognize this deception? [חומת אנך] explains that uncovering their fraud does not require complex evidence or deep investigation. The proof lies in the message itself. By promising peace and security to sinners who actively despise God and violate His laws, these prophets clearly expose their own deceit [רד״ק, חומת אנך]. This glaring contradiction makes it publicly obvious that they are lying, rendering the obligation to ignore them clear and absolute.