[Those are some good questions. He doesn't know that he has good answers. There's a voice that reminds him it's selfish. His existence directly threatens others, those still alive. But as if in response to that, and to Faust, he shakes his head.]

I don't... feel like... I'm at the end... I... I'm not a ghost... I'm not... done. I don't think... I've lived. I don't know... what I did... who I was... but I didn't...

[He lifts a hand, running it through his hair. Then he chokes out a laugh.]

I didn't live... I didn't- didn't do it right... [He turns to Faust.] If you had a chance... to fix a mistake... wouldn't you? Don't you... want to live...? [He shakes his head again.] I'm not ready... I'm not done... I'm going to... find who I am... find... someone who knew me... who... I might have loved... I'm going to live... I'm not dying... before I've lived...