Check out this note from John Piper to teenagers: he writes this for the liberation of teenagers. He writes to challenge teenagers to “live as people who are free” (1 Peter 2:16). To be wise and strong and free from the slavery of culture-conformity. To put it another way, he is calling teenagers to a radical, wartime lifestyle.
My favorite line from the whole article is this, “Let the messages of the Commander [God] sink in. Your identity is deeper and stronger and more durable and more glorious than any plastic veneer that your peers try to pressure you into. “You are not your own, for you were bought with a price. So glorify God in your body” (1 Corinthians 6:19–20). You are a treasured possession (1 Peter 2:9). You are a son or daughter of the Creator of the universe (Romans 8:16). With these truth-daggers in your hand, slay the ghoulish lies of peer pressure that try to deceive you into thinking conformity is freedom.”
Now go and read the whole thing for yourself!