Every time you pick a friend you could be picking a little chunk of your own destiny. For there is power in unity. Evil friends double deal good morals and destroy bright futures. There are only two kinds of people, good ones and bad ones. These two groups live very differently: their lifestyles and principles are opposed to each other.
Thus, you will walk in the ways of the good and keep to the paths of the righteous.
Proverbs 2:20 NIV