4 But if any one will inquire accurately, he will find also another, a third sense, in which this has been done. Of what sort is it then? In the sense of that future code of laws, which He was about to deliver to them.
For His sayings were no repeal of the former, but a drawing out, and filling up of them. Thus, “not to kill,” is not annulled by the saying, Be not angry, but rather is filled up and put in greater security: and so of all the others.
Wherefore, you see, as He had before unsuspectedly cast the seeds of this teaching; so at the time when from His comparison of the old and new commandments, He would be more distinctly suspected of placing them in opposition, He used His corrective beforehand. For in a covert way He had indeed already scattered those seeds, by what He had said. Thus, “Blessed are the poor,” is the same as that we are not to be angry; and, “Blessed are the pure in heart,” as not to “look upon a woman for lust;” and the “not laying up treasures on earth,” harmonizes with, “Blessed are the merciful;” and “to mourn” also, “to be persecuted” and “reviled,” coincide with “entering in at the strait gate;” and, “to hunger and thirst after righteousness,” is nothing else than that which He says afterwards, “Whatsoever ye would that men should do to you, do ye also to them.” And having declared “the peace-maker blessed,” He again almost said the same, when He gave command “to leave the gift,” and hasten to reconciliation with him that was grieved, and about “agreeing with our adversary.”
But there He set down the rewards of them that do right, here rather the punishments of them who neglect practice. Wherefore as in that place He said, “The meek shall inherit earth;” so here, “He who calls his brother fool, shall be in danger of hell-fire;” and there, “The pure in heart shall see God;” here, he is a complete adulterer who looks unchastely. And having there called “the peace-makers, sons of God;” here He alarms us from another quarter, saying, “Lest at any time the adversary deliver you to the judge.” Thus also, whereas in the former part He blesses them that mourn, and them that are persecuted; in the following, establishing the very same point, He threatens destruction to them that go not that way; for, “They that walk 'in the broad way,' says He, 'make their end there.'” And, “You cannot serve God and mammon,” seems to me the same with, “Blessed are the merciful,” and, “those that hunger after righteousness.”
But as I said, since He is going to say these things more clearly, and not only more clearly, but also to add again more than had been already said (for He no longer merely seeks a merciful man, but bids us give up even our coat; not simply a meek person, but to turn also the other cheek to him that would smite us): therefore He first takes away the apparent contradiction.
On this account, then, as I have already stated, He said this not once only, but once and again; in that to the words, “Think not that I have come to destroy,” He added, “I am not come to destroy, but to fulfill.”
“For verily I say unto you, Till Heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all come to pass.”
Now what He says is like this: it cannot be that it should remain unaccomplished, but the very least thing therein must needs be fulfilled. Which thing He Himself performed, in that He completed it with all exactness.
And here He signifies to us obscurely that the fashion of the whole world is also being changed. Nor did He set it down without purpose, but in order to arouse the hearer, and indicate, that He was with just cause introducing another discipline; if at least the very works of the creation are all to be transformed, and mankind is to be called to another country, and to a higher way of practising how to live.
5. “Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called least in the kingdom of Heaven.”
Thus, having rid Himself of the evil suspicion, and having stopped the mouths of them who would fain gainsay, then at length He proceeds to alarm, and sets down a heavy, denunciation in support of the enactments He was entering on.
For as to His having said this in behalf not of the ancient laws, but of those which He was proceeding to enact, listen to what follows, “For I say unto you,” says He, “Unless your righteousness shall exceed the righteousness of the Scribes and Pharisees, you shall in no case enter into the kingdom of Heaven.”
For if He were threatening with regard to the ancient laws, how said He, “except it shall exceed?” since they who did just the same as those ancients, could not exceed them on the score of righteousness.
But of what kind was the required excess? Not to be angry, not even to look upon a woman unchastely.
For what cause then does He call these commandments “least,” though they were so great and high? Because He Himself was about to introduce the enactment of them; for as He humbled Himself, and speaks of Himself frequently with measure, so likewise of His own enactments, hereby again teaching us to be modest in everything. And besides, since there seemed to be some suspicion of novelty, He ordered His discourse for a while with reserve.
But when you hear, “least in the kingdom of Heaven,” surmise nothing but hell and torments. For He was used to mean by “the kingdom,” not merely the enjoyment thereof, but also the time of the resurrection, and that awful coming. And how could it be reasonable, that while he who called his brother fool, and trangressed but one commandment, falls into hell; the breaker of them all, and instigator of others to the same, should be within the kingdom. This therefore is not what He means, but that such a one will be at that time least, that is, cast out, last. And he that is last will surely then fall into hell. For, being God, He foreknew the laxity of the many, He foreknew that some would think these sayings were merely hyperbolical, and would argue about the laws, and say, What, if any one call another a fool, is he punished? If one merely look on a woman, does he become an adulterer? For this very cause He, destroying such insolence beforehand, has set down the strongest denunciation against either sort, as well them who transgress, as them who lead on others so to do.
Knowing then His threat as we do, let us neither ourselves transgress, nor discourage such as are disposed to keep these things.
“But whosoever shall do and teach,” says He, “shall be called great.”
For not to ourselves alone, should we be profitable, but to others also; since neither is the reward as great for him who guides himself aright, as for one who with himself adds also another. For as teaching without doing condemns the teacher (for “you who teach another,” it is said, “do you not teach yourself”?) so doing but not guiding others, lessens our reward. One ought therefore to be chief in either work, and having first set one's self right, thus to proceed also to the care of the rest. For on this account He Himself has set the doing before the teaching; to intimate that so most of all may one be able to teach, but in no other way. For one will be told, “Physician, heal yourself.” Since he who cannot teach himself, yet attempts to set others right, will have many to ridicule him. Or rather such a one will have no power to teach at all, his actions uttering their voice against him. But if he be complete in both respects, “he shall be called great in the kingdom of Heaven.”
6. “For I say unto you, Unless your righteousness shall exceed the righteousness of the Scribes and Pharisees, you shall in no case enter into the kingdom of Heaven.”
Here by righteousness He means the whole of virtue; even as also discoursing of Job, He said, “He was a blameless man, righteous.” According to the same signification of the word, Paul also called that man “righteous” for whom, as he said, no law is even set. “For,” says he, “a law is not made for a righteous man.” And in many other places too one might find this name standing for virtue in general.
Source: Homilies on the Gospel of St. Matthew (New Advent)