Parallelism is the repetition of words or phrases that have similar grammatical structures. In the last two sentences of paragraph 4, on the article What to the Slaves Is the Fourth of July? mark two examples of parallelism. here are the last two sentences below

I am not that man. In a case like that, the dumb might eloquently speak, and the 'lame man leap as an hart'.

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.