5 But nevertheless, though having such great faith, he still accounted himself to be unworthy. Christ however, signifying that he was worthy to have Him enter into his house, did much greater things, marvelling at him, and proclaiming him, and giving more than he had asked. For he came indeed seeking for his servant health of body, but went away, having received a kingdom. Do you see how the saying had been already fulfilled, “Seek the kingdom of heaven, and all these things shall be added unto you.” For, because he evinced great faith, and lowliness of mind, He both gave him heaven, and added unto him health.
And not by this alone did He honor him, but also by signifying upon whose casting out he is brought in. For now from this time forth He proceeds to make known to all, that salvation is by faith, not by works of the law. And this is why not to Jews only, but to Gentiles also the gift so given shall be proffered, and to the latter rather than to the former. For “think not,” says He, by any means, that so it has come to pass in regard of this man alone; nay, so it shall be in regard of the whole world. And this He said, prophesying of the Gentiles, and suggesting to them good hopes. For in fact there were some following Him from Galilee of the Gentiles. And this He said, on the one hand, not letting the Gentiles despair, on the other, putting down the proud spirits of the Jews.
But that His saying might not affront the hearers, nor afford them any handle; He neither brings forward prominently what He has to say of the Gentiles, but upon occasion taken from the centurion; nor does He use nakedly the term, Gentiles: not saying, “many of the Gentiles,” but, “many from east and west:” which was the language of one pointing out the Gentiles, but did not so much affront the hearers, because His meaning was under a shadow.
Neither in this way only does He soften the apparent novelty of His doctrine, but also by speaking of “Abraham's bosom” instead of “the kingdom.” For neither was that term familiar to them: moreover, the introduction of Abraham would be a sharper sting to them. Wherefore John also spoke nothing at first concerning hell, but, what was most apt to grieve them, He says, “Think not to say, we are children of Abraham.”
He is providing for another point also; not to seem in any sense opposed to the ancient polity. For he that admires the patriarchs, and speaks of their bosom as an inheritance of blessings, does much more than sufficiently remove also this suspicion.
Let no man therefore suppose that the threat is one only, for both the punishment of the one and the joy of the other is double: of the one, not only that they fell away, but that they fell away from their own; of the other, not only that they attained, but that they attained what they had no expectation of: and there is a third together with these, that the one received what pertained to the other. And he calls them “children of the kingdom,” for whom the kingdom had been prepared: which also more than all was apt to gall them; in that having pointed to them as being in their bosom by His offer and promise, after all He puts them out.
Source: Homilies on the Gospel of St. Matthew (New Advent)