Advance!, by Tim Challies
Your teens and 20s will be put to the best and highest use if you make them a time of sanctification. Even now you can make bold steps in overcoming sin and embracing righteousness.
The Christian faith rises and falls upon this remarkable fact: God became man. Jesus Christ had to grow from a baby to an adult, from immaturity to maturity. Even he had to submit to his parents and advance in wisdom, stature, and favor with both God and man.
Advance! is my call to teens and young adults to learn from Jesus and make these years a time of deliberate preparation for the rest of life. I plead with you to use these years not first to focus on outward accomplishments that might shape the world, but inward achievements that will shape your character. In short, I call on you to be like Jesus.