The righteous sing and rejoice

Upon first read of Proverbs 29, you might say "well, that is all kind of common sense stuff."

 Proverbs 29:2 "When the righteous are in authority, the people rejoice: But when the wicked beareth rule, the people mourn." 

 or 

 Proverbs 29:12 "If a ruler hearken to lies, All his servants are wicked."

But what about:

Proverbs 29:9 "If a wise man contendeth with a foolish man, Whether he rage or laugh, there is no rest."  You can't resolve anything with a fool, the fool just can not understand or reason. It is just a waste of time to even try to talk with fool. Remember the fool is one with no common sense and can't be reasoned with so don't waste your time.   

Proverbs 29:5 "A man that flattereth his neighbour Spreadeth a net for his feet."

Flatter recognizes something that is nice, and in turn uses it to bring on pride. Then when the pride comes, so does the fall. If you flatter someone don't over do it.

The book of Proverbs is often called a book of wisdom.  There are truths for everyone in this chapter alone.  It begins with an explanation of what happens when a man despises reproof- he hardens his neck; and concludes that a man who loves righteousness is an abomination to the wicked.  

Proverbs 29:6 "In the transgression of an evil man there is a snare: But the righteous doth sing and rejoice."