Of course we could try to forget the past. Why not? Is it not nature for a human being to repress what causes him pain, what causes him shame? Like the body, memory protects its wounds. When day breaks after a sleepless night, one’s ghosts must withdraw; the dead are ordered back to their graves. But for the first time in history, we could not bury our dead. We bear their graves within ourselves. For us, forgetting was never an option. In the above excerpt, what literary or rhetorical device is used?

extended metaphor
ethos
hyperbole
parallelism