Anne wanted her diary to be published after the war, so that people around the world would know what the Nazis had done to the Jewish people of Europe. Her diary entries showed a change in her character, as she found a new purpose in her life. Her entries became more serious, too, as Anne wrote about why human beings do terrible things and questioned whether humans are basically good or evil.
In the previous video, Anne told her sister, "I don't want to have lived in vain" ("in vain" means for no reason). Why did Anne come to see her diary as a way to give her life meaning?