Proverbs 13

Verse 7 - One pretends to be rich, yet has nothing; another pretends to be poor, yet has great wealth.

This is a well established fact.  Living like you're rich makes you poor, and the poor are often tempted to live like they're rich out of envy or selfishness.  Living like you're poor makes you rich, and the rich often get that way by living on a tight budget.

There is also a spiritual parallel, which Jesus points out in the Sermon on the Mount: "Blessed are the poor in spirit, for theirs is the kingdom of heaven" (Matthew 5:3).  The Pharisees thought they could see, so their blindness remained (also see Revelation 3:17).  The beggars came to Jesus knowing their poverty, and they became rich.

Verse 10 - By insolence comes nothing but strife, but with those who take advice is wisdom.

Strife seldom comes from honest disagreement.  It comes from self-seeking, and fighting for what you want (James 4:1-2).

Also notice, taking advice is always the opposite of quarreling.  If you remain in a posture of seeking and receiving wisdom from anyone who may have it, you will usually avoid an argument.

Finally, insolence is the opposite of wisdom; it is foolishness.  It often masquerades as indignation at the folly of others, but foolishness by its nature doesn't recognize its own folly.  It is wise in its own eyes (Proverbs 3:7; Romans 12:16).