"I've never considered myself a very good public speaker," he says. "I think the reason, the sole reason, I succeed is whenever I go somewhere and I'm talking to people, I have a purpose. If you put me in a room full of high school kids, and I have no purpose in mind, I'll be that kid in the corner. But you give me some purpose, let me try to convey something to them, then I'm focused. I'm driven to that goal, and I'm precise."