How we cite our quotes: All quotations are from The Dark Knight.
Quote #4
THE JOKER: You have nothing, nothing to threaten me with. Nothing to do with all your strength!
This moment's important because it demonstrates that you don't have to beat someone up to win. Batman can pound the Joker into a green and purple pancake, and it's not going to do him any good. His opponent's holding all the cards.
Quote #5
THE JOKER: Choose between one life or the other: Your friend the District Attorney, or his blushing bride-to-be!
As always, the Joker has stacked the deck here. No matter who Batman chooses, someone is going to die, which turns the whole affair into a no-win situation.
Quote #6
RACHEL: When I told you that if Gotham no longer needed Batman we could be together, I meant it. But now I'm sure the day won't come when you no longer need Batman. I hope it does; and if it does I will be there, but as your friend.
A quieter form of defeat here, but man does it sting. Rachel's going with Harvey over Bruce, a prospect so awful to Bruce's psyche that Alfred burns her note spelling all this out. What can the Joker do compared to that?