Vision: In the eight years since Mr Stark announced himself as Iron Man... the number of known enhanced persons has grown exponentially. During the same period... the number of potentially world-ending events has risen at a commensurate rate.
Steve Rogers: Are you saying it's our fault?
Vision: I'm saying there may be a causality. Our very strength invites challenge. Challenge incites conflict. And conflict... breeds catastrophe.
Vision: You're afraid.
Ultron: Of you?
Vision: Of death. You're the last one.
Ultron: You were supposed to be the last. Stark asked for a savior and settled for a slave.
Vision: I suppose we are both disappointments.
Ultron: I suppose we are.
Vision: Humans are odd. They think order and chaos are somehow opposites and... try to control what won't be. But there is grace in their failings. I think you missed that.
Ultron: They're doomed.
Vision: Yes. But a thing isn't beautiful because it lasts. It's a privilege to be among them.
Ultron: You're unbearably naive.
Vision: Well... I was born yesterday.
Ultron: You think you're saving anyone? I turn that key and drop this rock a little early and it's still billions dead. Even you can't stop that.
Thor: I am Thor, son of Odin, and as long as there is life in my breast... I am running out of things to say! Are you ready?
(Vision hits Ultron with Thor's hammer)
Vision: It's terribly well-balanced.
Thor: Well, if there's too much weight, you lose power on the swing, so...