Does man have a choice about whether or not he will reach heaven? Or is the fate of his soul decided from the get-go, with him powerless to change it? At first, it seems like Doctor Faustus is clearly in the latter camp. Our good-turned-bad doctor thinks he's damned no matter what he does. But as the play goes on, Faustus wavers, wondering if he still has time to repent, and if his sin is forgivable. The play never comes down on one or the other side of the debate, sometimes portraying Faustus's fall as his own choice, at other times letting him off the hook. In the end though, it just might be a little bit of both. Faustus's fall has been caused by his choice to believe that he's damned. That causes him to refuse to repent, and refusing to repent is the one sin that's truly unforgiveable.
Faustus has a choice about whether or not he goes to hell, but he doesn't seem to get that it's his responsibility. The fact that he always passes the buck is what really sends him to hell.
Faustus was predestined to hell. He never had a choice, and that's that.