I think you can get better in mathematics on a school level, but when you're talking about being a mathematician, I think that's definitely a gift of genes or whatever.

You carry that through and adapt it to a camera lens, but you're quite right, you cannot be sure of what an audience is going to do. You don't know what's going to happen to the piece you're doing anyway. You don't know how it's going to be edited. There are a lot more unknowns in cinema. But that you have to readily accept. That's when, I think, you have to forget about intellect, to a degree. Intuition is very important when you're working with a lens, I believe, for what the lens is doing, too.

I find myself more interested in producing. Not because I'm interested in the financial side of it, but just getting together the right elements to make a film, that side of production. I would not be good on the financial side. It would be a disaster from the beginning.

I think particularly Daniel [Radcliffe], he knows what he's doing. I'm sure he'll finish up a producer. He really realized what it was, knew the size of it. And it was gigantic, the biggest franchise [Harry Potter] in history.

Acting is an imaginative leap, really, isn't it? And imaginations prosper in different circumstances. And it's being able - I can't tell you how one does, but one tries to read those circumstances correctly.

There may be arrangements to have me retired but I don't know. Things happen that I enjoy doing, and as long as I enjoy doing them I'll go about doing them, I guess.

Each day, as you get older, there is a new perspective on life. It's a progression of some sort.