Natasha Romanoff: The truth is a matter of circumstances, it's not all things to all people all the time. And neither am I.
Steve Rogers: That's a tough way to live.
Natasha Romanoff: It's a good way not to die, though.
Steve Rogers: You know, it's kind of hard to trust someone when you don't know who that someone really is.
Natasha Romanoff: Yeah. Who do you want me to be?
Steve Rogers: How about a friend?
Natasha Romanoff: [chuckles] Well, there's a chance you might be in the wrong business, Rogers.