Proverbs 15:7

The wise spread knowledge, but fools lack the inner foundation to do so.

To show that the speech of the wise spreads knowledge while the inner life of fools lacks the moral substance necessary to do the same.

Proverbs 15 continues the sayings that contrast the righteous and the wicked, especially as seen in speech, conduct, and worship. The surrounding verses (15:6–8) juxtapose what is valuable and acceptable before the LORD with what is troubled and rejected. Verse 7 fits the chapter’s recurring emphasis that words are never morally neutral; they are either shaped by wisdom or by folly. The verse’s shift from “lips” to “heart” reinforces that speech is an overflow of inner moral orientation, not merely a communication skill. In the flow of the immediate unit, wise speech functions as a kind of public good, while foolishness is exposed as an internal deficiency that breaks that good.

Proverbs presents wisdom instruction within Israel’s covenant life, where speech, integrity, and fear of the LORD are central to communal flourishing. The proverb assumes a moral order in which words can either nourish others with truth or expose inner folly.