One of the key things for me about Madame Walker's life is that she really does represent this first generation out of slavery when black people were reinventing themselves, and as a woman who was the first child in her family born free, she was trying to figure out a way, and she moved from Delta, Louisiana.

Madam Walker, as part of the first generation out of slavery, really was inventing the way that she operated in the world.

'Reinventing the Bazaar,' by John McMillan, is a great and fun introduction to the wild variety and importance of markets throughout history and around the world. I finally understood how a Middle Eastern souk actually works economically and how to compare that to modern-day telecom-spectrum auctions. I love that book.

I think I initially started inventing characters in my songs because I didn't want to write directly about myself. Also, as a kid, I loved all the character names in Beatles songs, like Eleanor Rigby and Lovely Rita and Mean Mr. Mustard and Maxwell and Rocky Raccoon.

I'm like Madonna: I keep reinventing myself.

When I was younger, people were inventing a new way of writing - James Joyce, Hemingway, Faulkner. And I thought we had to find a structure for cinema. I fought for a radical cinema, and I continued all my life.

The day I made that statement, about the inventing the internet, I was tired because I'd been up all night inventing the Camcorder.

I used to be an amateur inventor when I was a kid; I'm always inventing something.

Truth be told, of course, what I enjoy most is reinventing myself and doing new projects where I work in new genres, or I get to find what the voice of a particular musical is.