How does the narrators discussion of slave songs fit into or challenge his relationship with his readers?

At the end of chapter 2, Douglass reaches out to readers who may have heard of the
songs of slaves and mistakenly believed them to show evidence of a content and joyful spirit.
Douglass attributes this misunderstanding to his audience in the North, but it can apply to all
white Americans by extension.

Instead, Douglass asserts, the songs of slaves
show the deep pain that only a sorrowful song can capture. He says that,...