Arthur Fleck: Is it just me, or is it getting crazier out there?
[last lines]
Arkham Psychiatrist: What's so funny?
Arthur Fleck: I'm just thinking of a joke.
Arkham Psychiatrist: Do you want to tell it to me?
Arthur Fleck: You wouldn't get it.
Arthur Fleck: I've been the man of the house for as long as I can remember. I take good care of my mother.
Murray Franklin: All that sacrifice, she must love you very much.
Arthur Fleck: She does. She always tells me to smile and put on a happy face. She says I was put here to spread joy and laughter.
Arthur Fleck: Comedy is subjective, Murray, isn't that what they say? All of you, the system that knows so much: you decide what's right or wrong the same way you decide what's funny or not.
Arthur Fleck: Have you seen what it's like out there, Murray? Do you ever actually leave the studio? Everybody just yells and screams at each other. Nobody's civil anymore. Nobody thinks what it's like to be the other guy. You think men like Thomas Wayne ever think what it's like to be someone like me? To be somebody but themselves? They don't. They think that we'll just sit there
and take it, like good little boys! That we won't werewolf and go wild!
Murray Franklin: I'm waiting for the punchline.
Arthur Fleck: There is no punchline.
Cop: The whole city's on fire 'cause of what you did.
Arthur Fleck: I know. Isn't it beautiful?
Arthur Fleck: I know it seems strange, I don't mean to make you uncomfortable. I don't know why everyone is so rude; I don't know why you are. I don't want anything from you. Maybe a little bit of warmth, maybe a hug, dad? How about just a little bit of fucking decency!
Thomas Wayne: What kind of coward would do something that cold blooded? Someone who hides behind a mask. Someone who is envious of those more fortunate than themselves, yet they're too scared to show their own face. And until those kinds of people change for the better, those of us who made something of our lives will always look at those who haven't as nothing but clowns.