So the third batch of green was actually a stanza from “My Country, ‘Tis of Thee.” And then the fourth was a Negro spiritual. “Free at last! Free at last! Thank God Almighty, I’m free at last!”
So what he did is he actually reached inside of the hearts of the audience. He pulled from scriptures what is important. He pulled from songs that they’d sung together, as an outcry against this outrage and he used those as a device to connect and resonate with the audience. Ending, painting a picture of this new bliss, using the very things inside of them that they already held as sacred.