Ooh, nice topic. Not dialogue per se (does it count if the narrator says it?), but these lines stuck out to me and remembered them well after playing because of their wholesomeness and their anaphoric(?) progression:
"Gather the bull, gather the man, gather the friend unto himself."
"Gather the man, gather the dear, gather the beloved to his lover."
Short, nice rhythm, and makes you go "I remember that, look how far we've gone!".