Final answer:
Elie Wiesel mentions several things that he shall never forget, including the Holocaust, Nazi atrocities, and the suffering and dehumanization of the Jews.
Step-by-step explanation:
Elie Wiesel, in his writings, mentions several things that he shall never forget. These include the horrific experiences of the Holocaust, the atrocities committed by Nazis, the suffering and dehumanization of the Jews, and the loss of family members and friends. He also emphasizes the importance of remembering these events as a way to prevent them from happening again.