What is a good quote about the Nazis from the number the starts?

At the beginning of the novel, Mrs. Rosen gives Annemarie and Ellen valuable advice about how to avoid the Nazis. Although Mrs. Rosen might seem extremely cautious––or even paranoid––to modern readers, she had a good reason to be worried. In German-occupied countries, Jewish citizens were arrested and 'relocated' to concentration camps, where they were enslaved or killed. Although Ellen's dark hair makes it hard for her to hide her identity, she can avoid confrontations with German soldiers by making an effort to remain inconspicuous.

"It is important to be one of the crowd, always. Be one of many. Be sure that they never have reason to remember your face."