In both a powerful discourse and an influential paper you are trying to convince your gathering of people to agree with your disagreement. One difference would clearly be that in one your are writing and in the other you are talking which implies you may have an alternate gathering of people between the two. Another disagreement would be that when writing a paper you can incorporate more weakness and describe while the conversation includes more visual models.
It definitely adds more meaning to the story than what was already there. I think it can definitely put you in a better place of understanding especially if you've had a loss like that. Knowing this makes me respect the book, and the writer them self more than I already did. Lovely book of I may say.