In this passage, King expands the bounds of his dream for America. Now, his dream isn’t just rooted in the promises America has already laid out itself: it’s rooted in all Americans coming together in brotherhood and freedom. In other words, he doesn’t stop at a baseline of begrudging equality—he wants people to genuinely love and respect one another and overcome their differences. When King uses emotional language in this passage, he’s leaning on the rhetorical device of
pathos—an appeal to the audience’s feelings. He’s trying to inspire the audience to dream along with him by arousing sentimental images of brotherhood and forgiveness. When he pivots back to the contrasting language of sweltering heat and redemptive coolness at the end of this passage, he’s engaging the audience’s senses as well as their feelings. King’s speech, especially in passages like this one, strikes a careful balance between a rousing call to action and an intimate portrait of what America can look like if people all across the country commit themselves to justice.