A common misinterpretation views this verse as condemning all lies or criticism outright, ignoring its specific focus on lies motivated by hatred and slanderous speech that harms reputations maliciously; it is not a blanket prohibition on deception in every context or honest rebuke, but targets hypocrisy and destructive gossip within the wisdom literature's emphasis on character contrasts, leading some to wrongly equate any negative speech with foolishness while overlooking the proverb's relational and moral intent.
Proverbs 10:18
King James Version (1769)
18 He that hideth hatred with lying lips, and he that uttereth a slander, is a fool.
Proverbs 10:18 contrasts two foolish behaviors rooted in deceit and malice: concealing hatred behind lying lips, which feigns friendship while harboring resentment, and openly uttering slander, which spreads damaging falsehoods about others; both reveal a lack of wisdom, as true righteousness demands integrity in speech and heart, promoting honesty and restraint rather than hypocrisy or gossip.