answer:You’re going to need to define “soul” very carefully for this question to make sense. Same for “true self”. It seems the jury is still out on what either of those terms means. But all of your personality, awareness, memories and everything else that makes you who you are, biologically speaking that’s all in your brain. There is no other body part that contains that information. Perhaps a brilliant geneticist could use the information in your DNA to reconstruct what your brain was like when you were born, but that information will find no expression in your body any more.