In case you missed it, Robert Genn posted a fabulous quote recently, by Garrison Keillor. When asked, "How did you master both writing and oral storytelling," Keillor replied: "I didn't. There's no mastery to be had. You love the attempt. You don't master a story any more than you master a river. You feel lucky to canoe down it." Replace writing/story with art/painting and it is just as true.