Yes, the movie I referred to here is Casablanca. The dialogues in the movie are among the best I’ve heard – but then, cynicism makes for the best witticisms.

Another thing about the dialogues in Casablanca is that you sometimes get the feeling that they are repeating too many cliches, even when you know that it is not the fault of the movie. The movie originated those quotes and they’ve become so famous that they’ve passed into common usage. The feeling is much more when you are reading Shakespeare or the Bible. It sometimes seems as if half the idiomatic expressions in English come from the Bible, half from Shakespeare and movies like Casablanca making up the rest.