Raymond Chandler said this quote

I have a sense of exile from thought, a nostalgia of the quiet room and balanced mind. I am a writer, and there comes a time when that which I write has to belong to me, has to be written alone and in silence, with no one looking over my shoulder, no one telling me a better way to write it. It doesn't have to be great writing, it doesn't even have to be terribly good. It just has to be mine.