The excerpt from the Declaration of Independence that Douglass' lack of freedom and rights contradicts is:
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."
Douglass was a slave, and as such, he was not considered equal to other men by the society of his time. He was denied his right to life, liberty, and the pursuit of happiness. Therefore, his situation contradicts the ideals expressed in this excerpt from the Declaration of Independence.