You must have discipline for writing. It is not an easy task. It is very lonely. You're all alone. You are not in company. You are not enjoying yourself in that sense. You are enjoying yourself in another sense. You are delving into your depths, but you are profoundly lonely. It is one of the loneliest careers in the world. In the theater, you are with companions, with directors, actors. In film. In an office. In writing, you are alone. That takes a lot of strength and a lot of will to do it.