3 However, he stops not at the rebuke, but introduces advice also. For, “Bring forth,” says he, “fruits meet for repentance.”
For to flee from wickedness is not enough, but you must show forth also great virtue. For let me not have that contradictory yet ordinary case, that refraining yourselves for a little while, you return unto the same wickedness. For we are not come for the same objects as the prophets before. Nay, the things that are now are changed, and are more exalted, forasmuch as the Judge henceforth is coming, His very self, the very Lord of the kingdom, leading unto greater self-restraint, calling us to heaven, and drawing us upward to those abodes. For this cause do I unfold the doctrine also touching hell, because both the good things and the painful are for ever. Do not therefore abide as you are, neither bring forward the accustomed pleas, Abraham, Isaac, Jacob, the noble race of your ancestors.
And these things he said, not as forbidding them to say that they were sprung from those holy men, but as forbidding them to put confidence in this, while they were neglecting the virtue of the soul; at once bringing forward publicly what was in their minds, and foretelling things to come. Because after this they are found to say, “We have Abraham to our father, and were never in bondage to any man.” Since then it was this, which most of all lifted them up with pride and ruined them, he first puts it down.
And see how with his honor paid to the patriarch he combines his correction touching these things. Namely, having said, “Think not to say, We have Abraham to our father,” he said not, “for the patriarch shall not be able to profit you anything,” but somehow in a more gentle and acceptable manner he intimated the self-same thing, by saying,
“For God is able of these stones to raise up children to Abraham.”
Now some say, that concerning the Gentiles he says these things, calling them stones, metaphorically; but I say, that the expression has also another meaning. But of what kind is this? Think not, says he, that if you should perish, you would make the patriarch childless. This is not, this is not so. For with God it is possible, both out of stones to give him men, and to bring them to that relationship; since at the beginning also it was so done. For it was like the birth of men out of stones, when a child came forth from that hardened womb.
This accordingly the prophet also was intimating, when he said, “Look unto the hard rock, whence you are hewn, and to the hole of the pit, whence you are dug: look unto Abraham your father, and unto Sarah that bare you.” Now of this prophecy, you see, he reminds them, showing that if at the beginning he made him a father, as marvellously as if he had made him so out of stones, it was possible for this now also to come to pass. And see how he both alarms them, and cuts them off: in that he said not, “He had already raised up,” lest they should despair of themselves, but that He “is able to raise up:” and he said not, “He is able out of stones to make men,” but what was a much greater thing, “kinsmen and children of Abraham.”
Do you see how for the time he drew them off from their vain imagination about things of the body, and from their refuge in their forefathers; in order that they might rest the hope of their salvation in their own repentance and continence? Do you see how by casting out their carnal relationship, he is bringing in that which is of faith?
Source: Homilies on the Gospel of St. Matthew (New Advent)