Some mighty good advice.
1 Do not fret because of those who are evil
or be envious of those who do wrong;
2 for like the grass they will soon wither,
like green plants they will soon die away.
3 Trust in the Lord and do good;
dwell in the land and enjoy safe pasture.
4 Take delight in the Lord,
and he will give you the desires of your heart.
5 Commit your way to the Lord;
trust in him and he will do this:
6 He will make your righteous reward shine like the dawn,
your vindication like the noonday sun.
7 Be still before the Lord
and wait patiently for him;
do not fret when people succeed in their ways,
when they carry out their wicked schemes.
8 Refrain from anger and turn from wrath;
do not fret—it leads only to evil.
9 For those who are evil will be destroyed,
but those who hope in the Lord will inherit the land.
Psalm 37:1-9 (NIV)