Passage
A man full of tongue shall not be established in the earth: evil shall catch the unjust man unto destruction.
A man full of tongue shall not be established in the earth: evil shall catch the unjust man unto destruction.
Psalms 139:10 The head of them compassing me about: the labour of their lips shall overwhelm them.
Psalms 139:11 Burning coals shall fall upon them; thou wilt cast them down into the fire: in miseries they shall not be able to stand.
Psalms 139:12 A man full of tongue shall not be established in the earth: evil shall catch the unjust man unto destruction.
Psalms 139:13 I know that the Lord will do justice to the needy, and will revenge the poor.
Psalms 139:14 But as for the just, they shall give glory to thy name: and the upright shall dwell with thy countenance.
The verse centers on "full", "tongue", "shall", "established", "earth", "evil", and "catch". It is saying that the verse draws attention to "full" and "tongue", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "Burning coals shall fall upon them thou..." into verse 13's "I know that the Lord will do...", so "full" and "tongue" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "full" and "tongue" with trust shaped by these words, not by a vague optimism outside the passage.