The righteous choose their friends carefully, but the way of the wicked leads them astray. – Proverbs 12:26
Some places where else this is discussed:
Prov. 18:24; 22:24-25
My thoughts:
How do you pick your friends? I know for myself people can come into my life and I’m drawn to them, not thinking about their character too much. It can be easy to connect with people at an emotional or intellectual level, but not delve into all of who they are. 
Friends do influence us both in good and bad ways, and this proverb speaks of how it is the mark of the righteous to choose them carefully. Let’s be wise with who we hang out with so we aren’t influenced to turn away from God.
Thanks for reading! Pete.
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Thoughts or questions? Have your say in the comments section!
Note: All scripture is taken from Bible.com and is the New International Version. I am using a commentary by John A. Kitchen for help with references, and difficult concepts and words. Plus he has a real way with words!
Photo Attribution: Tuyền Dương Used under Creative Commons BY-NC-ND 2.0
On Proverbs 