The Difference.

"That first step onstage is an unusual feeling. I'm not sure I can connect it to other people's lives outside of perhaps taking a driver's test. You really want that license. The feeling in your gut means you're sober -- and that's good. It also means something's at stake, something that matters. You're taking a risk, which is the essence of all live performance. It's not an entirely comfortable feeling, but it's a necessary one. It happens every time, and it tends to stop the minute I put my hands on any instrument".

Bruce Springsteen.