If you arrive at a concert ready to play your piece, that's not nearly good enough. You must have your music ready to the point where you can play it on a short rehearsal, after a long plane flight, on a strange piano, having had an unpleasant lunch, in an unfriendly atmosphere. You have to be so over-prepared that you can cope with anything.
Discovering how to spend leisure time well, especially during a time of austerity, could be as important in the effort to reduce crime as having extra police on the streets, and increasing the population of concert halls may actually help decrease the population of prisons.
If I'm walking along the street, ideas come. Ideas about things that I'm interested in. I've jotted them down in the past on bits of paper and then, more recently, on apps in my phone. I've always written poetry since I was a kid.
I think it all comes from the same source, really, the writing of music, the writing of words, the playing of music. It's what drives anyone to be interested in the arts. I think it's a poetic gene; it's a wanting to go beyond.
When you're a kid, Beethoven is Beethoven, but as I've grown older, my astonishment at the sheer inventiveness of the man has increased, and I have an appreciation that I didn't have when I was in my 20s.