I think the ambiguity of similarity and difference is very powerful. It's the same scene in different times of year read across the grid, and, of course, different locations reading vertically. But you can get confused and lost in the series. You force the mind, which is always comparing and contrasting, to stumble ... That ambiguity is very powerful. One is getting lost and refinding oneself.

About shadows: do we see shadows? Loads of people don't. A camera will notice a shadow, but how many people have got a shadow in front of them when they take a picture and don't notice it, and then they see it in the photograph because the photograph will catch the shadow.

I do believe that painting can change the world.

I'm a bit claustrophobic, I know that now.

On the 31st of October 2011 year, I had a mini-stroke. I couldn't finish my sentences. So I went to the doctor. It was a tiny one. The speech came back in a month or so. I did notice I could draw even better, I felt. I was concentrating more. And I wasn't talking much, but I was drawing. I said, "Well, I don't have to talk much."

I did come from a pretty independent-minded family.

I've always been interested in space in pictures. I think my going deaf increased my spatial sense, because I can't get the direction of sound. I feel that I see space very clearly, and that's because I can't hear it. So it's a compensatory thing.