Proverbs tells us that if we walk with wise men, we will be wise.
We become like the people we hang around.
The converse is also true.
If we walk with fools, we will be a fool.
Two pithy statements about this:
It’s hard to soar like an eagle when you’re surrounded by turkeys.
And this one was introduced to me by my friend, Chris Hinkley:
Cancel my subscription. I no longer need your issues.
Some people don’t want their problems solved. they just want people who will throw them a pity party.
Avoid all these people.
If you do not, you will become like them.
Joel Stiff's Adventure 