1Boast not of to-morrow; for you know not what the next day shall bring forth.
2Let your neighbor, and not your own mouth, praise you; a stranger, and not your own lips.
3A stone is heavy, and sand cumbersome; but a fool's wrath is heavier than both.
4Wrath is merciless, and anger sharp: but envy can bear nothing.
Proverbs 27
Proverbs 27:1-4