In his "I Have a Dream Speech," Martin Luther King, Jr. remarked, "I have a dream that one day my four children will live in a n
ation where they will not be judged by the color of their skin but by the content of their character." King's language use is an example of _____. (A) alliteration
(B) metaphor
(C) a rhetorical question
(D) hyperbole
To give it a definition, a metaphor is an implicit comparison between two things, words or phrases that wouldn't usually be linked to each other. When Martin Luther King, Jr. explains what he expects for his children, what he really means is that he wishes they will be judged by the "content of their character", that is to say, by their personality, ideas and actions.
This quote can be found only in the movie. It can be heard in the third movie, and is told by the headmaster. I just checked the book, and it doesn't appear there.