“Suppose you make the acquaintance of a young person who is handsome and attractive, but who seems to be harboring a secret. It would be tactless and reprehensible to try to penetrate this secret and wrest it from him. But it is doubtless permissible to inquire whether he has any siblings to see whether their nature could not perhaps explain somewhat the enigmatic character of the stranger. This is exactly how the true critic inquires into the siblings of the work of art. And every great work has its sibling (brother or sister?) in the realm of philosophy.
Walter Benjamin, a Theory of Criticism