The simulacrum is never what hides the truth—it is truth that hides the fact that there is none. The simulacrum is true. — Ecclesiastes - Jean Baudrillard

Such would be the successive phases of the image:
it is the reflection of a profound reality;
it masks and denatures a profound reality;
it masks the absence of a profound reality;
it has no relation to any reality whatsoever: it is its own pure simulacrum.
In the first case, the image is a good appearance—representation is of the sacramental order. In the second, it is an evil appearance—it is of the order of maleficence. In the third, it plays at being an appearance—it is of the order of sorcery. In the fourth, it is no longer of the order of appearances, but of simulation.

For it is with the same imperialism that present-day simulators try to make the real, all of the real, coincide with their simulation models.

When the real is no longer what it was, nostalgia assumes its full meaning.