Sirach 22:9 CPDV

⁷  Whoever teaches the foolish is like someone who glues together a broken pot.

⁸  Whoever explains a word to one who is not listening is like someone who suddenly awakens a sleeping person from a deep sleep.

⁹  Whoever explains wisdom to the senseless is like one speaking to a sleeping person. And at the end of the explanation, he says: 'Who is this?'

¹⁰  Weep over the dead, for his light has failed. And weep over the foolish, for his understanding has failed.

¹¹  Weep only a little over the dead, for he is at rest.