In Proverbs 25:18, false witness is likened to a club, sword, and arrow—the same weapon imagery as the madman's firebrands and arrows, both describing harmful deception.

Proverbs 10:23 says wrongdoing is a joke to a fool — directly mirrors the deceiver here who thinks his harmful deceit is just a joke.

Proverbs 15:21 says folly is joy to the senseless — the deceiver here finds joy in his deceitful joke.

Proverbs 14:9 notes that fools mock at sin — similar to the deceiver who jokes about deceiving his neighbor.