17 Whoever speaks[1] the truth gives honest evidence, but a false witness utters deceit.

18 There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.

Matthew Henry's Commentary on Proverbs 12:17-18

Commentary on Proverbs 12:17

(Read Proverbs 12:17)

It is good for all to dread and detest the sin of lying, and to be governed by honesty.

Commentary on Proverbs 12:18

(Read Proverbs 12:18)

Whisperings and evil surmises, like a sword, separate those that have been dear to each other. The tongue of the wise is health, making all whole.