Passage
The tongue of the wise commends knowledge, but the mouth of fools gush out folly.
Proverbs 15:2 (WEB)
Nearby Context
Proverbs 15:1 A gentle answer turns away wrath, but a harsh word stirs up anger.
Proverbs 15:2 The tongue of the wise commends knowledge, but the mouth of fools gush out folly.
Proverbs 15:3 Yahweh’s eyes are everywhere, keeping watch on the evil and the good.
Proverbs 15:4 A gentle tongue is a tree of life, but deceit in it crushes the spirit.
Study Lenses
The verse centers on "tongue", "wise", "commends", "knowledge", "mouth", "fools", "gush", and "folly". It is saying that the verse draws attention to "tongue" and "wise", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 1's "A gentle answer turns away wrath but..." into verse 3's "Yahweh s eyes are everywhere keeping watch...", so "tongue" and "wise" belong inside that flow. In Proverbs context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "tongue" and "wise" with trust shaped by these words, not by a vague optimism outside the passage.