Listener question: how does the self disappear?

Listener question: I'm curious if when the 'self' (as a mental concept) dies ... does it die once and thats its we can't go back seeing that 'self' as real ever again OR is it more a process where it continues dying and birthing, dying and birthing over and over again through our whole life OR is it more that it crumbles away slowly over time but onces its fully crumbled that' it.