What does Proverbs Chapter 27 say, and which statements belong to its speaker?

Proverbs 27 forbids boasting of tomorrow’s unknown events and asks another or a stranger to praise rather than oneself. Stone and sand are heavy, a fool’s anger heavier; anger has no mercy, fury breaks forth and provoked violence is difficult to bear. Open rebuke exceeds hidden love; a lover’s wounds contrast an enemy’s deceitful kisses. Fullness tramples honey, hunger finds bitterness sweet. A wandering bird compares a man leaving his place. Ointment, perfume and a friend’s counsel sweeten the heart. Keep your friend and your father’s friend; do not go to a brother’s house in affliction, for a near neighbor exceeds a distant brother. The son’s wisdom gladdens the speaker and answers reproach. Prudence sees evil and hides; little ones pass and suffer loss. Take a stranger-surety’s garment and pledge. A loud blessing while rising in the night resembles a curse.

A wrangling woman resembles a leaking roof on a cold day; retaining her compares holding wind and calling oil in the right hand. Iron sharpens iron, a friend’s countenance a friend. Fig-tree keeping brings fruit, keeping a master future glory. Faces shine in water, hearts open to the wise. Hell and destruction never fill, nor men’s eyes. A praising mouth tests a man like silver and gold testing; the wicked heart seeks evil, the righteous knowledge. Even pounding a fool with a pestle among sodden barley will not remove folly. Know cattle’s countenance and consider flocks: power is not always, but a crown shall be given from generation to generation. Open meadows, green herbs and mountain hay lead to lambs for clothing and kids for the field’s price. Let goats’ milk suffice for food, household and handmaids. This closing counsel does not report achieved prosperity or reverse the crown’s wording.