There are many qualities one must possess to be a working writer or artist. Talent, brains, tenacity. Wealthy parents are good. You should definitely try to have those. But first among equals, when it comes to necessary ingredients, is selfishness. A book is made out of small selfishnesses. The selfishness of shutting the door against your family. The selfishness of ignoring the pram in the hall. The selfishness of forgetting the real world to create a new one. The selfishness of stealing stories from real people. The selfishness of saving the best of yourself for that blank-faced anonymous paramour, the reader. The selfishness that comes from simply saying what you have to say.