Dialogue survives across generations when it accomplishes two distinct tasks at once: defining an intimate character relationship while offering listeners a universal truth they can apply to their own lives. Lucas built a world around stark mythic archetypes, but the performers, polishers, and subsequent screenwriters kept those archetypes from becoming hollow cartoons.
By pushing back against clunky drafts, ad-libbing character reactions in carbonite chambers, and eventually anchoring the universe in nuanced political literature, generations of storytellers turned space opera into an enduring international dialect. Audiences continue to quote these films because the words carry emotional weight that outlives the digital effects surrounding them.