I put forward formless and unresolved notions, as do those who publish doubtful questions to debate in the schools, not to establish the truth but to seek it.
By the time I came to do the final ones [Harry Potter's film], I was working on something that was massively successful. There was a huge difference in indulgence and all sorts of stuff. A very big difference in peoples' attitudes. They were very pleased with themselves. In human terms, it was quite interesting to see the difference.