Sirach 21:18

18 Like a house in disrepair, so is wisdom to the foolish, and the knowledge of ignorant people will not stand up to examination.

Sirach 21:18 In-Context

16 A fool's endless talk is a burden while on a journey, but grace will be found on the lips of the intelligent.

17 The speech of the prudent will be sought out in an assembly, and its members will take their words to heart.

18 Like a house in disrepair, so is wisdom to the foolish, and the knowledge of ignorant people will not stand up to examination.

19 Education is shackles on the feet of the ignorant, like manacles on their hand.

20 Fools raise their voice in laughter, but clever people will smile subtly in silence.