Preserve your memories, keep them well, what you forget you can never retell.
I think immortality is the passing of a soul through many lives or experiences, and such as are truly lived, used and learned, help on to the next, each growing richer, happier and higher, carrying with it only the real memories of what has gone before.
Back to him she would never go, but in her lonely life still lived the sweet memory of that happy time when she believed in him and he was all in all to her.