But more basically, I am in Birmingham because injustice is here. Just as the prophets of the eighth century B.C. left their villages and carried their "thus saith the Lord" far beyond the boundaries of their home towns, and just as the Apostle Paul left his village of Tarsus and carried the gospel of Jesus Christ to the far corners of the Greco Roman world, so am I compelled to carry the gospel of freedom beyond my own home town. Like Paul, I must constantly respond to the Macedonian call for aid.
KEY POINT OF MEANING: this correlation that he used was powerful. Dr. king dumbs it down as to how passionate he is about spreading the message of true freedom for his people. By using philosophical stories that we've heard of before, that can make us relate to his purpose.