לָמָּה־זֶּ֣ה מְחִ֣יר בְּיַד־כְּסִ֑יל לִקְנ֖וֹת חָכְמָ֣ה וְלֶב־אָֽיִן׃
Wherefore is there a price in the hand of a fool To buy wisdom, seeing he hath no understanding?
Rashi on Proverbs
Why is there a price in the fool’s hand to buy wisdom To learn the Torah.
Rashi on Proverbs
when the heart is not here In his heart, he has no intention of fulfilling it, and he learns only to gain a reputation.