them befor >> you wte about the fact that he's starts -- in.is: the speech has a ll es you cahear mahalia jksonthe backgrod saying, tell him the dream, martin. she had hrd h use this refrain before he goes off script afteing encouraged by his friend ttell them about the dream. the speech just takes off and blows up. that is tharty right that we remember. you have written the ok on it. is e contract in the beginninthat really makes the eech. it ishat platform he built that makes all thadream stuff possible at the end. talko me about the fir half of how he constructed the speech. >> onef the things to point out is that the beginning prepares for the end in a very simple cents. he starts afr hisrief welcome by invoking the raham lioln without naming him, five score years ago american -- eat american in ose shadow we sta today. he sets the stagehere for the metaphoof the promissory note, which hdevelops a great lenh in the early. reps. -- in the early paragraphs. his belief in the pure idl articulated by thomas jefferson and to the constitutio itself, about ich there was areat argumentbout whether