In spite of his words to the Syro-Phoenicean woman, Jesus doesn’t limit the gospel to his own people.  St. John Chrysostom sees him pointing beyond a small world.

 “You are the salt of the earth. It is not for your own sake, he says, but for the world’s sake that the word is entrusted to you. I am not sending you only into two cities or only into ten or twenty, not to a single nation, as I sent the prophets of old, but across land and sea, to the whole world. And that world is in a miserable state. For when he says: You are the salt of the earth, he is indicating that all humanity had lost its savor and had been corrupted by sin…

  Do not think, he says, that you are destined for easy struggles or unimportant tasks. You are the salt of the earth… 

  Then he passes on to a more exalted comparison: You are the light of the world. Once again, “of the world”: not of one nation or twenty cities, but of the whole world. The light he means is an intelligible light, far superior to the rays of the sun we see, just as the salt is a spiritual salt. First salt, then light…A city set on a hill cannot be hidden; nor do men light a lamp and put it under a basket. Here again he is urging them to a careful manner of life and teaching them to be watchful, for they live under the eyes of all and have the whole world for the arena of their struggles.