Speech and Influence
Verse 10a declares that even a gesture can cause sorrow. Verse 10b is a duplicate of the latter part of verse 8. The LXX renders this part, "a frank rebuke will make for peace."
Verse 11 declares that the mouth or speech of the righteous is a well of life (spiritual life derived from the LORD, Psalms 36:7-9) and manifested in the conduct of the righteous, Psalms 37:30; John 8:12. In contrast is the malice and mischief manifested in the speech of the wicked, Proverbs 13:14; Proverbs 16:22; Matthew 12:35.
Verse 12 contrasts the tendency of hatred to provoke strife with the conciliating influence of love, Genesis 21:9-11; Genesis 27:41-42; Acts 13:50; Genesis 40:15; Genesis 45:5-8; Philemon 1:9-18; James 5:20; 1 Peter 4:8; 1 Corinthians 13:7.
Verse 13 declares that wisdom is found in the words of one who has understanding, Proverbs 2:2; Proverbs 3:13; Proverbs 4:7; Proverbs 16:2. The LORD has promised to instruct and guide those who seek understanding (Psalms 32:8), but there is a rod for those who ignore His offer, Vs. 13b; Proverbs 26:3; Psalms 32:9; Matthew 12:35.
Verse 14a emphasizes that it is wise to store up knowledge of truth and understanding to meet legitimate needs as they arise, Proverbs 15:2; Proverbs 15:28; 1 Peter 3:15.
Verse 14b contrasts the tendency of the foolish who lay not up knowledge, yet are quick to speak unadvisedly on every subject, to the detriment of self and others, Proverbs 13:16; Proverbs 15:2; Proverbs 18:6-7; Psalms 50:19-20; Psalms 52:2-4.