6 See ye how that which you have heard out of the Gospel was at that time to come is now present. Therefore, said He, on occasion of the commendation of the Centurion's faith, as in the flesh an alien, but of the household in heart, “Therefore I say unto you, Many shall come from the east and west.” Not all, but “many;” yet they shall “come from the East and West;” the whole world is denoted by these two parts. “Many shall come from the east and west, and shall sit down with Abraham, and Isaac, and Jacob, in the kingdom of heaven; but the children of the kingdom shall be cast out into outer darkness.”
“But the children of the kingdom,” the Jews, namely. And how “the children of the kingdom”? Because they received the Law; to them the Prophets were sent, with them was the temple and the Priesthood; they celebrated the figures of all the things to come. Yet of what things they celebrated the figures, they acknowledged not the presence. And, “Therefore the children of the kingdom,” He says, shall go into outer darkness, there shall be wailing and gnashing of teeth. And so we see the Jews reprobate, and Christians called from the East and West, to the heavenly banquet, to sit down with Abraham, and Isaac, and Jacob, where the bread is righteousness, and the cup wisdom.
Source: Sermons on Selected Lessons of the New Testament (New Advent)