Passage
Of the fruit of a man's mouth shall his belly be satisfied: and the offspring of his lips shall fill him.
Of the fruit of a man's mouth shall his belly be satisfied: and the offspring of his lips shall fill him.
Proverbs 18:18 The lot suppresseth contentions, and determineth even between the mighty.
Proverbs 18:19 A brother that is helped by his brother, is like a strong city: and judgments are like the bars of cities.
Proverbs 18:20 Of the fruit of a man's mouth shall his belly be satisfied: and the offspring of his lips shall fill him.
Proverbs 18:21 Death and life are in the power of the tongue: they that love it, shall eat the fruits thereof.
Proverbs 18:22 He that hath found a good wife, hath found a good thing, and shall receive a pleasure from the Lord. He that driveth away a good wife, driveth away a good thing: but he that keepeth an adulteress, is foolish and wicked.
The verse centers on "fruit", "man's", "mouth", "shall", "belly", "satisfied", "offspring", and "lips". It is saying that the verse draws attention to "fruit" and "man's", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 19's "A brother that is helped by his..." into verse 21's "Death and life are in the power...", so "fruit" and "man's" 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 "fruit" and "man's" with trust shaped by these words, not by a vague optimism outside the passage.