I say to people I'm in my late period. Obviously, as you get older you're in your late period anyway, but to decide you are becomes a concept. It's related to the concept of my retirement, which was about the fact that I'd shown at the greatest gallery in the world and I'd never top that... So, I retired from the jealousy of other artists, and ambition. I could alternatively have become a Buddhist or something - it is a kind of beatific state.