I used to work very long hours. Then I started to realize that the stuff that I was writing in the late afternoons, I was generally throwing out. So I quit earlier than I used to.
It was inevitable that in doing this I should arrive at new results, and it is perhaps understandable that in the end I have felt impelled to present these results not only in the dry form of a catalogue, but also in a more connected and personal one.
It is hard to rationalise or explain why you love what you love. But I have always been interested in science and maths, and in high school I was struck that you could use maths to understand nature and science.