There is a positive change when one learns to value past experiences without simultaneously feeling the desire to relive them. It could be said that doing so is something like stimulating and appreciating memory, while at the same time blocking out nostalgia. The resulting feeling has no name, but it gives thanks for the experience by putting it in its place. And from this come valuable lessons, the main one perhaps being the notion that there is time for everything to happen. One learns by living, and learning is the recognition that what has been lived has had its place.