In daily life we never understand each other, neither complete clairvoyance nor complete confessional exists. We know each other approximately, by external signs, and these serve well enough as a basis for society and even for intimacy. But people in a novel can be understood completely by the reader, if the novelist wishes; their inner as well as their outer life can be exposed. And this is why they often seem more definite than characters in history, or even our own friends; we have been told all about them that can be told; even if they are imperfect or unreal they do not contain any secrets, whereas our friends do and must, mutual secrecy being one of the conditions of life upon this globe.