For all those who believe they do not need help with your writing, I present Tim Park’s argument for what an editor can do for you:

The editor’s job then becomes one of helping the writer to see where an unessential, perhaps unconscious departure from the norm is actually draining energy away from places where the text is excitingly unconventional. That is, the editor reminds an author that to construct a coherent identity he has to remember his relationship with society and with the language we share and cannot express ourselves without. To go out on a limb linguistically, accepting no compromise and creating an idiolect that really is entirely your own, may win awed admiration, as did Finnegans Wake, but will likely not attract many readers, and arguably does not allow for the communication of nuance, since all the ordinary reader will understand is that you are indeed off on a trip on your own…

In Praise of the Language Police by Tim Parks | NYRblog | The New York Review of Books.