Oh boy....just an opinion here, coming from an autistic adult who grew up as an autistic kid in the 60's [when they didn't even know what autism was], but you don't travel back and forth through time, you travel from side to side. You can represent this mathematically and visually but it is tedious. I think when you die, if you haven't accomplished what you're supposed to you come back in another form or body, etc. but you come from a lateral dimension occupying the same space but in a different phase.

I said "oh boy" at the beginning, so that at least should grant me some reprieve when the rest of this board decides to stone me to death for being a koo-koo.