My grandmother believes in reincarnation. Even though she has little to no evidence she will swear to you that it's as real as the monitor you're now staring at instead of doing work. She tried to convince me that I was once a gladiator, probably because I took an avid interest in ancient Roman history when I was young.
Still she meant well and tried to instill a value system in me that if one leads a good life today they'll be rewarded in the next. Simpleton philosophy is attractive to the naive and sometimes insecure and there's no convincing her to think otherwise. Her unhappiness in this existence makes her cling to the belief that after she passes on she'll someday enjoy life. I guess it's easier than changing your circumstances.
I want to come back as a cat and would do the below as much as humanly possible.
"Whether or not we believe in survival of consciousness after death, reincarnation, and karma, it has very serious implications for our behavior." - Stanislav Grof