I took four years off after 'In the Cut' because I wanted to see who I'd be without work. I even tried being a hermit in the wilderness in New Zealand. I stayed in a warden's hut two-and-a-half hours off the Routeburn Track through the fjords on the South Island. It was early winter, so there was no electricity or running water.

I think feature film can be quite conservative, because you have to now get audiences to come out, and it's quite a hard thing to do. Of course, television can be conservative too.

Because there is that sort of feeling that people don't know what to do with gaps in their lives. It's a scary notion, but actually, if you can stand in space just for a little while, a new door will open, or you'll be able to see in the dark after a while. You'll adjust.

It's been such a deep and amazing journey for me, getting close to John Keats, and also I love Shelley and Byron. I mean, the thing about the Romantic poets is that they've got the epitaph of romantic posthumously. They all died really young, and Keats, the youngest of them all.

For me, being a director is about watching, not about telling people what to do. Or maybe it's like being a mirror; if they didn't have me to look at, they wouldn't be able to put the make-up on.

Eight years ago, I was drawn into Keats's world by Andrew Motion's biography. Soon I was reading back and forth between Keats's letters and his poems. The letters were fresh, intimate and irreverent, as though he were present and speaking. The Keats spell went very deep for me.

The Piano Lesson' is very sophisticated, easily the most adult or complex material I've attempted. It's the first film I've written that has a proper story, and it was a big struggle for me to write. It meant I had to admit the power of narrative.