Like a dog chasing after its own tail, the pursuit of the past—nostalgia—is forever doomed to failure, twice over. The attempt to recapture a moment that has already passed and slipped us by, is always at one remove. No photograph can sufficiently stand for the recalled moment in its entirely for the photograph is always and only a snapshot.
To exacerbate matters, our desires are even questionable as well. Are those desires really our own? For according to Lacan, the desire is the Other’s desire, the desire of the Symbolic Order. Much like canned laugher, we are always prompted on when to laugh and when not too. When an individual desires something, it is always a social product that is by no means an individual’s decision. Language, the Symbolic Order, decides your desire for you.
In this context, then, is not our desire for the past an endless search for something that will never materialize again, something that always eludes our comprehension no matter how we try to conceive it on our own terms.
Having said that, I suggest it is time we give up this desire for the past, for that wholeness which never will and could be for in the end, who are we fooling? Certainly not people around us but ourselves. If so, then the saying “The grass is always greener on the other side” is telos par excellence. The Chinese even have an equivalent saying for it, “好马不吃回头草.”
It’s time to let go and move on; no more turning back.
 Translated literally, it would mean that a good horse never goes back to old pastures. Again, it implies a teleological transition which breaks out of the circularity of the existentialist ethic.