The Muse must have a shape. You will write a thousand words a day for ten or twenty years in order to try to give it shape, to learn enough about grammar and story construction so that these become part of the Subconscious, without restraining or distorting the Muse. By living well, by observing as you live, by reading well and observing as you read, you have fed Your Most Original Self. By training yourself in writing, by repetitions exercise, imitation, good example, you have made a clean, well-lighted place to keep the Muse. You have given her, him, it, or whatever, room to turn around in. And through training, you have relaxed yourself enough not to stare discourteously when inspiration comes into the room.
(How to Keep and Feed a Muse) (Ray Bradbury, Zen and the Art of Writing)