If a writer knows enough about what he is writing about, he may omit things that he knows. The dignity of movement of an iceberg is due to only one ninth of it being above water.
Ernest HemingwayMy,' she said. 'We're lucky that you found the place.' We're always lucky,' I said and like a fool I did not knock on wood. There was wood everywhere in that apartment to knock on too.
Ernest Hemingway