"You played it for her: play it for me!"
"You despise me, don't you?" "If I gave you any thought I probably would."
These and a hundred other lines are so well-known, they ought to come off as parody in the original. Yet they don't: they're as meaningful and emotionally resonant as the writer and director intended them to be.
It's a brilliant film that has outlasted the norms of acting and storytelling that it so beautifully showcases. Why? I don't enough about film to say. I'm just delighted it has.