영어 번역 도와주세요ㅠㅠㅠ

And when this happens, and when we allowfreedom ring, when we let it ring from every village and every hamlet, from everystate and every city, we will be able to speed up that day when all of God'schildren, black men and white men, Jews and Gentiles, Protestants andCatholics, will be able to join hands and sing in the words of the old Negrospiritual: free at llast! free at last! 

해석이 안돼ㅠㅠ 이해가 안돼ㅠㅠㅠ