I don’t play piano much, but I took lessons as a kid and have poked around some as an adult. And there’s a way your fingers feel when they’re hitting the right keys — an inevitability, like the steps of a dance.
Sometimes, when I get into the flow of writing, my fingers feel that way. Like they’re dancing, and they know the steps so well, I don’t have to think about it at all.
Other times… I stare at my fingers and think, “Why won’t you dance? I love it when you dance. Please dance.”