Matthew Henry Commentary Proverbs 10:21-23

"The lips of the righteous feed many; But the foolish die for lack of understanding. The blessing of Jehovah, it maketh rich; And he addeth no sorrow therewith. It is as sport to a fool to do wickedness; And [so is] wisdom to a man of understanding." — Proverbs 10:21-23 (ASV)

Four types of people are very troublesome:

1. Men of low origin and base spirit, who, once they gain authority, become tyrants.
2. Foolish and violent men indulging in excesses.
3. A woman of a contentious spirit and vicious habits.
4. A servant who has obtained undue influence.

Let those whom Providence has advanced from humble beginnings carefully watch against that sin which most easily besets them.