"That change didn't happen from the top down, but it happened from the bottom up. It was met sometimes with skepticism and doubt. Some folks didn't think we could pull it off. There were those that felt that the institutions of power and privilege in this country were too deeply entrenched. And yet, all of you came together in small towns and big cities, a whole bunch of you really young, and you decided to believe and you knocked on doors and you made phone calls and you talked to your parents who didn't know how to pronounce Barack Obama. And you got to know each other. And you went into communities that maybe you had never even thought about visiting and met people that on the surface seemed completely different than you -- didn't look like you or talk like you or watch the same TV programs as you. And yet, once you started talking to them, it turned out that you had something in common. And it grew and it built. And people took notice. And throughout, it was infused with a sense of hope. As I said in 2004, it wasn't blind optimism that drove you to do all of this work. It wasn't naiveté. It wasn't willful ignorance to all the challenges that America faces. It was hope in the face of difficulty. Hope in the face of uncertainty. You proved the power of hope."