Here’s Linn Ullmann, in an interview with Vogue, on her father Ingmar Bergman:
My father was a very disciplined and punctual man; it was a prerequisite for his creativity. There was a time for everything: for work, for talk, for solitude, for rest. No matter what time you get out of bed, go for a walk and then work, he’d say, because the demons hate it when you get out of bed, demons hate fresh air. So when I make up excuses not to work, I hear his voice in my head: Get up, get out, go to your work.
Yet another reason to get out of bed and take a walk.