“Bury your dead, Jean Louise,” Atticus says as they change venues. Directly, he is referring to Jem, but more than that, he means her innocence and the infallible version of him. 

Go Set a Watchman, by Harper Lee

Some things are so deeply engraved in us it makes removing them like discarding a functional, essential piece of us – like throwing away healthy tissue or brain cells. Maybe we should accept some things manage to go down deep to our roots and become part of who we are. Maybe we can only reinvent ourselves, not redo ourselves. Because the alternative is essentially turning into a zombie – living but incapable of being alive without what makes up our very core. 
Moments of the past, gone, just do not belong anymore.