Endorphin production

I was just thinking about running. I used to run a lot, and on a really really good day I'd find that it was easier (more desirable?) to keep on running than to stop... as if I could go on forever.
Today while making this drawing I experienced the same thing.

It started out based on a quick brush and ink drawing I did on Friday. Making drawings from other drawings has often fed my process. But, it's not about that anymore. I'm appreciating the mystery inherent in drawings that evolve over time, sort of 'through me' and not always of me.

Everyday should be this rich.