The topic of personal identity is strictly speaking nonexistent

[spiros]

The topic of personal identity is strictly speaking nonexistent. It’s important to recognize that we are not the kind of things that simply popped into existence at birth, continue to exist, the same thing, then die off the cliff edge or go into another realm. We are these very remarkably ordered collections of things. It is because we’re so ordered that we are able to think of ourselves as being singular persons. But there is no singular person there, that means we’re forever changing.
— Julian Baggini