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. with this faith we will be able to work together, to pray together, to struggle together, to go to jail together, to stand up for freedom together, knowing that we will be free one day. –"i have a dream," martin luther king jr. king uses a metaphor to describe despair as a mountain and hope as a stone that can come from that mountain. how does the comparison king achieve his purpose? it tells people where to go to keep fighting for their rights. it illustrates the idea that good can come from a bad situation. it explains that fighting for rights is similar to climbing a mountain. it causes people to feel despair that they have been treated unequally for so long.