Commentaire sur L’Ecclésiaste 7:19

Wisdom gives [more] strength to the wise. Since it stated, “be not excessively wicked,”⁴⁵Above, verse 17. if you have been somewhat wicked, do not add to it, rather examine your deeds and regret the sin. He states, “wisdom gives [more] strength to the wise,” because it leads him to repentance.⁴⁶Rashi explains the juxtaposition of verse 17 with this verse is to teach that in the event a person sinned slightly, his wisdom will encourage him to repent his way. (Sifsei Chachomim)

“Wisdom will bolster the wise more than ten rulers who are in a city” (Ecclesiastes 7:19).
“Wisdom will bolster the wise” – this is the Holy One blessed be He, as it is stated: “Wise of heart, mighty of strength” (Job 9:4); “more than ten rulers who are in a city” – than the ten statements with which the world was created.¹¹⁸People will be quicker to recognize God through Torah than by appreciating the miracle of His creation of the world (Maharzu).
Another matter, “wisdom will bolster the wise” – this is Adam the first man, as it is written: “You are the culmination of perfection, [full of wisdom]” (Ezekiel 28:12); “more than ten rulers who are in a city” – these are the ten organs that serve the soul: esophagus for food, trachea for voice, liver for wrath, gall bladder for envy, the lung drains,¹¹⁹It drains harmful fluids. stomach to grind, spleen to crush, kidneys advise, heart understands, tongue concludes.¹²⁰The tongue expresses a person’s thoughts. The midrash is saying that wisdom is better than one’s bodily functions and emotions.

Than ten rulers. We find regarding Yoshiyahu, that Scripture testified about him, “the likes of him there had never been a king before him, etc.”⁴⁷II Melochim 23:25. Therefore, his wisdom remained with him, and he examined his actions, and it was better for him than “ten rulers” who acted wickedly and did not repent.⁴⁸Alternatively, the חכם refers to Yoseif, and the ten rulers refer to Yoseif’s brothers. (Targum)