The religion I have is music. Even the times I have headaches, when I'm singing, I can't feel them. My dad used to say that, too, especially near the end of his life. He would be in pain - a lot of pain - and he said the only time when he didn't feel pain was when he performed and sang.

When I was 18 years old, I went on the road with my dad after I graduated from high school. And we were riding on the tour bus one day, kind of rolling through the South, and he mentioned a song. We started talking about songs, and he mentioned one, and I said I don't know that one. And he mentioned another. I said I don't know that one either, Dad, and he became very alarmed that I didn't know what he considered my own musical genealogy.

My record label is treating me like I'm a new artist, which is exciting after all this time.

It is the people who scream the loudest about America and Freedom who see to be the most intolerant for a differing point of view.

He [Johnny Cash] was so fragile. We invaded Iraq in March, and he died in September. And because his health was so fragile, he couldn't take the controversy of making a public statement against the war. He knew that people were rabid. They attacked me mercilessly after I did the press conference with Musicians United to Win Without War. He knew that he couldn't tolerate that.

Celtic music is part of the language in Scotland and Ireland, where every kid and grandparent knows those songs, music by the likes of Woody Guthrie and Hank Snow is getting entrenched here. They are part of our cultural language. It's part of a living treasure. It doesn't just belong to a museum.

I think that my sensitivity to music has actually deepened and expanded as I've gotten older. You add more life experience.