If you choose bad companions no one will believe that you are anything but bad yourself. (Aesop’s Fables)
This is really good advice for young people who are often attracted to friends who seem to have so much, accomplish so much, and have great influence among their peers. Even when it is suspected that their activity is not always above board, the attraction for apparent success may be overwhelming. That’s why parents must help them choose the right friends and stick with them.
You must not associate with people who claim to be believers but continue to live in sin (1 Corinthians 5:11). Enjoy the companionship of those who call on the Lord with pure hearts (2 Timothy 2:22).