interpreting "I have a dream" from emotional perspective

I read Martin Luther King’s famous talk “I have a deam” and would like to explain it in the emotional perspective.
Looking over this text, obviously the author has used plenty of meaniful objects, such as “table of brotherhood”, “oasis of freedom and justice”…all of which associate greatly with the mood of love, hope and happinese. The author use these objects to convey his strong hope and also give readers that impression. It can be said that the object is a symbol to intensity author’s personal emotion.
The author has shown strong thetoric ability in this text, from which parallelism is the most significant one. “I have a dream, one day…” by using this sentence frequentely and correspondingly, the power of lauguage has been greatly enhanced. “let freedom ring -- from the prodigious hill tops of New Hampshire, let freedom ring; from the mighty mountains of New York.Let freedom ring -- from the…” many placename has given in this sentence, but we could see that author use the same sentence structure to express them. But instead of souding tedious, the repeat of the words make readers feel rhythmically and could othe hand affected by author’s strong emotion behind words.
Basically, this a public talk, and the main purpose of the writer is to encorage and to persuade. Thus, we could say that there is a “literature” tone though the whole article. By using a great of thetoric method, the article let readers feel enheartened.

link: http://www.cycnet.com/englishcorner/speech/dream.htm