I think the tree is an element of regeneration which in itself is a concept of time. The oak is especially so because it is a slowly growing tree with a kind of really solid heartwood. It has always been a form of sculpture, a symbol for this planet.
If someone asked me if I could have anything in the world, what would l want? If l could own anything, like owning a piece of art, l think it would be Elton John's publishing, on his first seven albums. I don't want the money. Being able to own those songs Is like owning a painting of someone you admire.