Play it Again, Sam! (or not)

I've just finished a watched of "Casablanca", that swoon-inducing movie that practically invented romantic clichés. Surprisingly, the ever-quoted "Play it again, Sam!" line isn't actually in the film. Here, however, are several other beautiful lines:
There's the ever popular: "We'll always have Paris."
Or, my special favorite: "...I have a feeling this is the beginning of a beautiful friendship."