That which is no longer illusion is dead and inspires terror. This is what the cadaver does, as does the clone, and more generally, anything that can be so confused with itself that it is no longer even capable of playing its own appearance. This limit of disillusion is that of death.
“Sometimes people hold a core belief that is very strong. When they are presented with evidence that works against that belief, the new evidence cannot be accepted. It would create a feeling that is extremely uncomfortable, called cognitive dissonance. And because it is so important to protect the core belief, they will rationalize, ignore and even deny anything that doesn’t fit in with the core belief.”
Frantz Fanon | Black Skin, White Masks