To those who don't understand, Taylor meant that Selena should hang out with people that she can learn from and be inspired by, implying that Justin Bieber is dumb.
She did a recent interview on the talk (it aired on CBS today). I think she did it on Wednesday because she wore the same outfit to jimmy kimmel (her hair was down tho).
The whole quote explains exactly what Taylor meant. Taylor was telling Selena should always surround herself with people smarter than Selena, so Selena can grow as a person.
People in this thread need some reading comprehension exercises. It's not that hard to grasp whatsoever. It's English.
She always says that to me