A classic essay on Casablanca by Umberto Eco:
Thus Casablanca is not just one film. It is many films, an anthology. Made haphazardly, it probably made itself, if not actually against the will of its authors and actors, then at least beyond their control. And this is the reason it works, in spite of aesthetic theories and theories of film making. For in it there unfolds with almost telluric force the power of Narrative in its natural state, without Art intervening to discipline it. And so we can accept it when characters change mood, morality, and psychology from one moment to the next, when conspirators cough to interrupt the conversation if a spy is approaching, when whores weep at the sound of "La Marseillaise." When all the archtypes burst in shamelessly, we reach Homeric depths. Two cliches make us laugh. A hundred cliches move us. For we sense dimly that the cliches are talking among themselves, and celebrating a reunion. Just as the height of pain may encounter sensual pleasure, and the height of perversion border on mystical energy, so too the height of banality allows us to catch a glimpse of the sublime. Something has spoken in place of the director. If nothing else, it is a phenomenon worthy of awe.Lost nearly achieved something like this. If not for the "we're all dead" nonsense, it would have been enough to know they were "waiting, waiting, waiting..."