The greatness of literature cannot be determined solely by literary standards though we must remember that whether it is literature or not can be determined only by literary standards.
As a rule, said Holmes, the more bizarre a thing is the less mysterious it proves to be. It is your commonplace, featureless crimes which are really puzzling, just as a commonplace face is the most difficult to identify.
If a novel reveals true and vivid relationships, it is a moral work, no matter what the relationships consist in. If the novelisthonours the relationship in itself, it will be a great novel.