I've started painting much more freely, and faster. I think it's working in the theatre that did it. You know what the Glyndebourne scene-painters said about my The Magic Flute? They said they had to wear sunglasses to paint it.

"Portrait of the Artist as a Naughty Boy," interview with John Mortimer, In Character (1983) ISBN 0-14-006389-7 p. 97