The chapter opens with a contrast: a dry crust eaten in quiet is better than a house full of feasting with strife (v. 1). Sayings about family follow: a wise servant may rule over a shameful son, and grandchildren are the crown of the aged (vv. 2, 6). Verse 3 compares the Lord to a refiner: the crucible tests silver and the furnace gold, but the Lord tests hearts.
A long series deals with justice and how we treat others. Mocking the poor insults his Maker (v. 5). Whoever covers an offense seeks love, but whoever keeps bringing it up separates close friends (v. 9). Returning evil for good brings evil into one's own house (v. 13). Acquitting the guilty and condemning the righteous are both things the Lord detests (v. 15). Friendship appears too: a friend loves at all times and a brother is born for adversity (v. 17), and the chapter warns against pledging security for another person too lightly (v. 18).
The chapter then turns to the heart and the tongue. A fool has money in hand but no desire to buy wisdom (v. 16); a joyful heart is good medicine, while a crushed spirit dries up the bones (v. 22). A foolish son is grief to his father (v. 25). Finally, the one who restrains his words has knowledge and the one with a cool spirit has understanding; even a fool who keeps silent is counted wise (vv. 27-28).