Iron Man2008

[After Pepper finds out about Tony's activities with his suit]

Pepper:
Tony... you know that I would help you with anything, but I cannot help you if you're gonna start all of this again.

Tony:
There is nothing except this. There's no art opening, there is no benefit, there is nothing to sign. There is the next mission, and nothing else.

Pepper:
Is that so? Well, then I quit. [Starts to walk out]

Tony:
You stood by my side all these years while I reaped the benefits of destruction. And now that I'm trying to protect the people that I've put in harm's way, you're gonna walk out?

Pepper:
You're going to kill yourself, Tony. I'm not going to be a part of it.

Tony:
I shouldn't be alive... unless it was for a reason. I'm not crazy, Pepper. I just finally know what I have to do. And I know, in my heart, that it's right.