Question

Read the passage.

Answer 1

to create contrast by highlighting the differences between his experiences and his audience's experiences

i hope helped %^-^%

Answer 2

Parallelism is a figure of speech very useful when intending to emphasize and make more memorable a comparison or contrast between two or more ideas and to bring clarity and conciseness to these thoughts.

In the passage, Douglass uses parallelism with that same purpose: he repeats certain parts of speech (The nouns "justice, liberty, prosperity and independence" and the object pronouns "is yours, not mine"), he repeats words ("by you, not by me") and grammar structures ("You may rejoice, I must mourn"), in order to create contrast by highlighting the differences between his experiences and his audience's experiences.