When I think about this verse, I think of teens who are trying to find their identity and purpose all on their own. Instead of embracing our individuality in Christ, we allow ourselves to get swept up in the many groups at school. Does being in a specific group at school determine who we are as individuals? If you said 'yes', then you need to do some serious thinking.
We are all our own person--created uniquely for God's purpose. "You are made by God for God--and until you understand that, life will never make sense." Our identity shouldn't be dependent on what group we are in--that's only temporary-- but finding our identity in Christ is everlasting. We shouldn't rely on the world to tell us who we are; God has already told us we are children of Christ, created for a special, significant purpose--to go out and be salt unto world and share the Gospel of God's mighty word!
We all have a purpose, none of us will ever find that out unless we let God take control. Romans 12:2 [NIV] says, "Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is—his good, pleasing and perfect will." We're all special, unique, gifted and loved! What more could you want?! Let God lead your life and you will find your purpose, your identity, and your place in the world.