'True work is done for the sake of doing it.'
‘Beginners' failures are often the result of trying to work with strong feelings and ideas without having found the images to embody them, or without even knowing how to find the words and string them together. Ignorance of English vocabulary and grammar is a considerable liability to a writer of English. The best cure for it is, I believe, reading. People who learned to talk at two or so and have been practicing talking ever since feel with some justification that they know their language; but what they know is their spoken language, and if they read little, or read schlock, and haven't written much, their writing is going to be pretty much what their talking was when they were two...
While planning a work, the writer may and often must think about readers: particularly if it's something like a story for children, where you need to know whether your reader is likely to be a five-year-old or a ten-year old. 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 , author of the classic The Left Hand of Darkness and Dancing at the Edge of the World on Brain Pickings