Evolving metaphors, in my opinion, is what artists do. They produce work that gives you the chance to experience in a safe environment, because nothing really happens to you when you looking at artwork, they give you the chance to experience what might be quite dangerous and radical new ideas. They give you a chance to step out of real life into simulator life. A metaphor is a way of explaining something that we've experienced in a set of terms, a different set of terms.

Brian Eno, in IMAGINATION Conference, June 1996