Proverbs 29

Verse 11 - "A fool gives full vent to his spirit, but a wise man quietly holds it back."

Self-expression is almost an absolute good in our time. but Scripture cautions us.  Maybe being understood isn't the most important thing in the world.  Where it conflicts with the law of love, we ought to give way.

Verse 12 - "If a ruler listens to falsehood, all his officials will be wicked."

Not only wicked rulers, but incompetent ones will encourage wickedness.  This is one way that power corrupts people.

Verse 18 - "Where there is no prophetic vision the people cast off restraint,[j] but blessed is he who keeps the law."

This one is often quoted as "Where there is no vision the people perish," asserting that leaders need to cast a vision for people to follow.  This mis-applies the text.  The point is more that without God's Word, we wander off discouraged or run off into folly.