"It can never be again! Everyone always talks about a good thing coming to an end, as if life was over. But I'll be 40 when this interview comes out. Paul is 38. Elton John, Bob Dylan — we're all relatively young people. The game isn't over yet. Everyone talks in terms of the last record or the last Beatle concert — but, God willing, there are another 40 years of productivity to go. I'm not judging whether "I Am The Walrus" is better or worse than "Imagine." It is for others to judge. I am doing it. I do. I don't stand back and judge — I do."