Auld said “If you give N-words an inch, he will take an ell. A N-word should know nothing but to obey his master.” The evidence directly shows that at that time, the slaveholders were totally unacceptable to the knowledge of their slaves. And then in chapter 7, Douglass also mentioned “"After that, when I met with any boy who I know could write.... I would then make the letters which have been so fortunate as to learn.” Black people can’t even spell words, but white people, even their children, have more knowledge than slaves. This contrast directly reveals the educational attainment of both sides under slavery, and it appeals to the emotions of the reader, and makes the reader sympathize with Douglas and the slave community as a whole. After gaining some knowledge, Douglas became more disappointed with his life and began to fantasize about his desire for freedom. As Douglass gained knowledge, he often compared his desired freedom with his current situation as a slave, emphasizing the inherent injustice of slavery. For example, he describes the joy and liberation he experienced while learning to read, contrasting it with the dehumanizing effects of