In blues, classical and jazz, you get more revered with age.

Elvis might have compromised his musical style a bit towards the end, but that doesn't mean that artists from the rock n' roll/folk-roots culture - of which he was not really a part - shouldn't get better as they get older, like the great jazz or blues artists.

Maybe the idea of me is more powerful than I perceive myself being.

In 1967 I entered Harvard as a freshman, confident - in the way that only 17-year-olds are - that I could change the world. My major was African Studies, and my plan was to travel to Tanzania, where President Julius Nyerere was creating a government based on democracy and socialism.

One of the biggest obstacles I've overcome in my life was thinking I didn't deserve to be successful. Artistically I'm not as much of a heavyweight as someone like Paul Simon or Joni Mitchell, because I'm not a creator of original music, and I worried about that for years.

I was raised with the blessing of being involved with peace and social justice, and the environmental movement. I have my parents to thank for that.

Quakers are known for wanting to give back. Ban the bomb and the civil rights movement and the native American struggle for justice - those things were very, very front-burner in my childhood, as were the ideas of working for peace and if you have more than you need, then you share it with people who don't.