The five people you meet in hEaven

Almost half way through the book but am already completely freaked out by it.Frankly speaking who choose's who you meet in heaven and is it all just about closure.
Certain things help to understand others but just set's one's long forgotten thoughts in motion.
Then there are the few that just completely freaks me out only because here you have someone a thrillion mile's away that managed to put exactly what i've thought about.... in the exact same words in a book... there's also the whole parent child issue where you can see obviously where your parent's have failed but you know you're almost destined to make the same mistakes with your own kids. Sooo much to say so little time to... In short who Do you meet in Heaven... someone you killed... someone who ruined your life... someone who saved your family inadvertantly saving your's... someone you truly loved with all your might and someone who suffered because of you.... But that's only IF you go to heaven.... Inadvertantly...