Help needed is great

Which sentence in this excerpt from the time machine suggest that the time travelled will later realize that his assumptions about future society are incorrect

Iam for the "immediate, unconditional, and universal" enfranchisement of the black man, in ev [loud applause.] without this, his liberty is a mockery; without this, you might as well almost slavery for his condition; for in fact, if he is not the slave of the individual master, he is the slay liberty as a privilege, not as a right. he is at the mercy of the mob, and has no means of protec how does the repetition of the phrase "without this" support the paragraph's argument? it reinforces the idea that without equality in the us, the idea of a free society is a joke. it suggests that a free society is possible, with or without equal rights for all people. it indicates that douglass would be content without material possessions or status. it proposes that slavery will not be abolished in the us without the support of all citizens.

In the poem i felt a funeral, in my brain what rhyme scheme does the poet use and how does it contribute to the poem?