Boast not thyself of tomorrow; for thou knows not what a day may bring forth. Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips. A stone is heavy, and the sand weighty; but a fool’s wrath is heavier than them both. Wrath is cruel, and anger is outrageous; but who is able to stand before envy? Open rebuke is better than secret love. Faithful are the wounds of a friend; but the kisses of an enemy are deceitful. Proverbs 27:1-6