" is an affectionate feeling you have for the past, especially for a particularly happy time"
Nostalgia definition and meaning| Collins English Dictionary
"By motivating us to remember the past in our own life helps to unite us to that authentic self and remind us of who we have been and then compare that to who we feel we are today. That gives us a sense of who we want to be down the road in the future."
Já não me recordo onde li, mas recentemente deparei-me com esta frase.
E fez todo o sentido!
