From Rolling Stone:

At one point, Downey’s Lazarus says, “I know who I am. I’m a dude playing a dude disguised as another dude,” which is a perfect line for Downey to have to deliver, because in a sense, his own identity, and who he really is, has long been up for grabs. Only two years ago, he looked at himself and his situation this way: “I’m not an actor. It’s my day job, and I learned how to hustle it really good. [But] it’s a hustle. I got some fuckin’ juice, man, I got some tools… . I learned some shit. I learned shit on the streets. It was providence, dude, and proximity to where I could get my grift on… . This is fuckin’ gypsy heaven, dude — there’s a million suckers out here.”