Elie Wiesel recalls his experiences during the Holocaust in his memoir, Night. Throughout the novel, he alludes to his mental list of things he "never shall forget."
These are his memories of the heinous events he watched and experienced, such as the killings of his family and friends, the violent treatment by Nazi guards, and the dehumanizing circumstances of the concentration camps.
Wiesel keeps these sad recollections as a method of commemorating the Holocaust victims and bearing testimony to the injustices done. He believes it is his responsibility to remember and share his experiences so that others can comprehend the enormity of the Holocaust and act to prevent such crimes from occurring in the future.