[Those are both very fair questions, and ones that Qui-Gon thankfully has relatively easy answers for, existential implications of said answers aside.]

The same power that brought me here moments after my death can be--and often is--used to bring others from different points in their life. There have also been instances where individuals have returned to their respective homes, only to return here shortly thereafter after time has passed.

[He pauses, then continues with a question of his own. His tone is gentle--given what he knows about the fate of their galaxy, and Obi-Wan's age, he knows the response is not likely to be happy.]

What is the last thing you remember?