Analyzing the Use of Repetition

Highlight a phrase that is repeated in this passage.

Continue to work with the faith that unearned suffering is redemptive. Go back to Mississippi, go back to Alabama, go back to South Carolina, go back to Georgia, go back to Louisiana, go back to the slums and ghettos of our northern cities, knowing that somehow this situation can and will be changed. Let us not wallow in the valley of despair.
—"I Have a Dream," Martin Luther King Jr.

1. What phrase is repeated in this passage?
2. What idea is emphasized through repetition?