How does Douglass' attitude about literacy evolve over the course of the text?

Initially, Douglass saw knowledge or literacy as a tool to freedom. He realized that many slave owners kept their slaves ignorant to insure their complacency. Later in the book, Douglass looked at literacy in a different way, or possibly I should say that he shared another facet of literacy from his own experience. In Douglass' later life, he shares the suffering..... the knowledge of the power literacy affords those who seek it, as well as the suffering brought on by the consciousness of their condition.