When I was a teenager at university in my first year of Electronics my white lab coat was pristine.
I got one of the medical students to take me into the medics dissection room full of dead bodies : they each had one to dissect. This would have been 1967. Years later I saw my dad's dead body. That was 1987.
All these had one thing in common. What made them "them" was no longer there.
Views on life after death vary widely. Some people believe something of "us" survives whereas others think we just cease to be. Nobody is really sure.