Poll: Classic Movie "Arc" Quotes

What's an arc quote? Well, what an arc quote is NOT is a catchphrase or a signature quote. "What's the Matrix?" "Who's Keyser Soze?" These are arc quotes. Arc quotes are generally repeated lines that work as leitmotifs to the main theme of the film, the plot mystery or the lead character's Aesopian arc. They often have an enigmatic value whose resolution comes at the end, or they can define the whole narrative or the hero's journey by gaining either more or a whole new significance by the end (in most cases, they're not delivered by the main protagonists). On the basis of this lengthy but (I hope) insightful presentation, here comes the question: which of these arc quotes would you say is the most classic? After voting, you may discuss the list here