I knew I wanted to sing when I was a very small boy. When I was probably 4 years old. My mother played a guitar and I would sit with her and she would sing and I learned to sing along with her.
If mathematics is to be understood widely, we need to emphasise its elegance and its applications. Sometimes it seems that universities want to emphasise how difficult it is!
I was making a film called The White Tower at the foot of Mont Blanc - the one thing I learned from that experience was that it's more difficult to go down a mountain than to go up. A lot of people don't realize that.

