Speak not in the ears of a fool: for he will despise the wisdom of thy words.
– Proverbs 23:9
Verse 9 stands alone, though it complements the pearls-before-swine aspect of the previous group. To speak … in the ears is to make a direct address. It refers to a direct word of reproof, counsel, or instruction. The word for fool is the most common in Proverbs and refers to a stupid and obstinate person. Their problem is not ignorance, or lack of information, but rather the hate and rejection of wisdom (Proverbs 1:22). Words of wisdom are lost on fools and gain only hatred for the speaker of them (Proverbs 9:7-8; 15:12).