Until then her view of time was the present moving forward and devouring the future; she either feared its swiftness (when she was awaiting something difficult) or rebelled at its slowness (when she was awaiting something fine). Now time has a very different look; it is no longer the conquering present capturing the future; it is the present conquered and captured and carried off by the past. She sees a young man disconnecting himself from her life and going away, forevermore out of her reach. Mesmerized, all she can do is watch this piece of her life move off; all she can do is watch it and suffer. She is experiencing a brand-new feeling called nostalgia.
Milan Kundera, Ignorance
nostalgia