Elie Wiesel is a Holocaust survivor, human rights advocate and writer, he wrote several books, one of the most famous one is Night, where he talks about his experience during the Holocaust and the impact it had on him and the power of memory in it.
In Night, Wiesel express his belief that the power of memory is essential to preserving the past and passing on the lessons of history. He uses various rhetorical devices to stress his point, including imagery, metaphor, and repetition.
For example, Wiesel repeatedly emphasizes the importance of bearing witness to the Holocaust, saying that "To forget would be not only dangerous but offensive; to forget the dead would be akin to killing them a second time" He uses imagery to describe the horrors he witnessed, such as describing the smell of burning flesh and ashes, this serve as a reminder of what happen.
He also uses metaphor to describe the impact of the Holocaust on his life, comparing it to a "golden chain" that links him to the past, and to the victims of the Holocaust.
Finally, Wiesel uses repetition to drive home the importance of remembering the Holocaust, repeatedly emphasizing that "For the survivor who chooses to testify, it is clear: his duty is to bear witness for the dead and for the living." This repetition serves to reinforce the importance of remembering the past in order to ensure that such atrocities will never happen again.