How we cite our quotes: (Paragraph.Sentence)
Quote #4
I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character. I have a dream today. (14.1)
This might be the most famous quote of the speech. The American Dream imagines the country as a meritocracy, or a place where the best and hardest-working people rise to the top. Hence, MLK dreams about character determining success. It's a dream of bringing African Americans into the fold of American values, rather than criticizing America's values.
Quote #5
With this faith we will be able to hew out of the mountain of despair a stone of hope. With this faith we will be able to transform the jangling discords of our nation into a beautiful symphony of brotherhood. (18.3-4)
Martin Luther King, Jr. likes to use metaphor to describe his hopes for the future. Some of the speech's plans for the future are specific, but here he goes for the general; since the context of this speech is a rally with 200,000 people, the non-specific, inspirational, and overarching message is appropriate.