Parallelism
Parallelism is using the same grammatical structure in a pair or series of related words, phrases, or clauses.
"[T]he value of parallel structure goes beyond aesthetics . . . [Parallel structure] points up the structure of the sentence, showing readers what goes with what [,] keeping them on the right track." (Cook, Claire K. Line by Line. Houghton Mifflin, 1985)
See"
audio recording:
King, Martin Luther, Jr. "I Have a Dream." Top 100 Speeches. American Rhetoric. Web. 20 Feb. 2011. http://www.americanrhetoric.com/speeches/mlkihaveadream.htm
video recording:
King, Martin Luther Jr. "I Have a Dream." TeacherTube, uploaded by Bcurranslhs. 2009, http://www.teachertube.com/video/mlk-i-have-a-dream-speech-20916