It's been over fifty years since media theorist Marshall McLuhan said that "First we shape our tools, and then our tools shape us." McLuhan had push back as folks wondered at the time if what he was saying was true. But time has proven McLuhan's theory to be correct. Now that we've hit the ten year anniversary of the launch of the iPhone, we're beginning to see how much our smartphones are shaping and changing our lives. How do our devices shape our beliefs and behaviors? What do they reflect about what's most important in our lives? And how can we use these magnificent tools to the glory of God, rather than in ways that are destructive? We'll be talking to Tony Reinke, author of the new book "12 Ways Your Phone Is Changing You," about this and much more, on this episode of Youth Culture Matters.