If your so called friends urge you to do anything you know to be wrong, you be the one to make a stand for right, even if you stand alone. have the moral courage to be a light for others to fallow. 
- Thomas s. Monson 
This quote is true because friends make you do stuff that are bad. They always tell you to this do that. They always tell you drink this or steal this or smoke this or inject this. If you don't do it you will be different and doing the right thing. But if you do do it you will be choosing the wrong and not be different.