Psalm 37; 1-4 ''Do not fret because of those who are evil or be envious of those who do wrong; for like the grass they will soon wither,like green plants they will soon die away. Trust in the LORD and do good; dwell in the land and enjoy safe pasture. Take delight in the LORD, and he will give you the desires of your heart.''
When I read the first part of this verse, I think of the Occupy WallStreet movement. They are not only fretting over those they think are evil but causing chaos themselves. I see it as a waste of time and would rather see them actually 'doing something' good. Leave the payback to God and He will give you your desires
The second part has to do with jealousy of wrong doers. When we work hard for something and get it, it puts a smile on our face. If we see people with more than us, its easy to want that too. How they obtained it is important tho. You can admire and respect those who didn't follow crooked paths to get what they have and to get where they are.
Psalm 37 goes on to say that we are not to turn to anger and that the wicked will be destroyed. By God's hand and wrath, not ours. The meek will inherit the earth so consider what little you have in earthly terms as much in heavenly terms....our treasure is in Heaven.