⁹ Don’t waste your breath on fools,
    for they will despise the wisest advice.

¹² To one who listens, valid criticism
    is like a gold earring or other gold jewelry.

⁵ An open rebuke
    is better than hidden love!

⁶ Wounds from a sincere friend
    are better than many kisses from an enemy.

¹⁷ As iron sharpens iron,
    so a friend sharpens a friend.

29 Whoever stubbornly refuses to accept criticism
    will suddenly be destroyed beyond recovery.