18 He who hides hatred has lying lips.
He who utters a slander is a fool.

19 In the multitude of words there is no lack of disobedience,
but he who restrains his lips does wisely.

20 The tongue of the righteous is like choice silver.
The heart of the wicked is of little worth. 21 The lips of the righteous feed many,
but the foolish die for lack of understanding.

Matthew Henry's Commentary on Proverbs 10:18-21

Commentary on Proverbs 10:18

(Read Proverbs 10:18)

He is especially a fool who thinks to hide anything from God; and malice is no better.

Commentary on Proverbs 10:19

(Read Proverbs 10:19)

Those that speak much, speak much amiss. He that checks himself is a wise man, and therein consults his own peace.

Commentary on Proverbs 10:20-21

(Read Proverbs 10:20-21)

The tongue of the just is sincere, freed from the dross of guile and evil design. Pious discourse is spiritual food to the needy. Fools die for want of a heart, so the word is; for want of thought.