J.R.R. Tolkien once wrote a short story called “Leaf by Niggle.” The main character, Niggle, is a painter. He envisions painting a grand tree set against a countryside and even a forest in the picture, along with mountains and birds and the tree's deep, strong roots.

But he keeps getting interrupted in his work by neighbors, the needs of others, and the responsibilities of everyday life. Those around him don't understand why he even bothers painting at all. There's far more important work to do. And so despite Niggle's best efforts at painting, he can't quite make the image on the canvas match the image in his mind. Parts of it are barely completed, “and only so so, at that.”