Book excerpt: The best-selling author of The 4:8 Principle and 40 Days to a Joy-filled Life returns with a special edition for teens. In just 40 days, teens can change their minds and their attitudes. Tommy Newberry, together with writer Lyn Smith, takes teens from thinking negatively to thinking positively, which will change their entire outlook on life. Not only will this devotional make teens think more positively and have a better attitude, this devotional also points teens to Scripture and helps them understand more about God. The devotions not only help teens understand how their thought life determines their perspective, but they also help them focus their minds on godly truths so they can live out their faith. This book is the perfect way for teens to get a new attitude and start living a fulfilling, joy-filled life in just 40 days.