The differences in planning and making art

"Considerations of who will or might read the piece are appropriate and sometimes actively useful in planning it, thinking about it, thinking it out, inviting images. But once you start writing, it is fatal to think about anything but the writing. True work is done for the sake of doing it. What is to be done with it afterwards is another matter, another job. A story rises from the springs of creation, from the pure will to be; it tells itself; it takes its own course, finds its own way, its own words; and the writer’s job is to be its medium."  - Ursula K. Le Guin

via Brain Pickings.