The four verses included in this section give a regular sequence of thought: Matt. 5:17 declaring our Lord's personal relation to the former revelation as fulfilling it; Matt. 5:18 basing that statement of the purpose of His coming on the essential permanence of the old law; Matt. 5:19-20 deducing thence the relation of His disciples to that law, and that in such a way that Matt. 5:19 corresponds to Matt. 5:18, and affirms that this permanent law is binding in its minutest details on His subjects, while Matt. 5:20 corresponds to Matt. 5:17, and requires their deepened righteousness as answering to His fulfilment of the law.
The first thing that strikes one in looking at these verses is their authoritative tone. There may, even thus early in Christ's career, have been some murmurs that He was taking up a position of antagonism to Mosaism, which may account for the think not' which introduces the section. But however that may be, the swift transition from the Beatitudes to speak of Himself and of the meaning of His work is all of a piece with His whole manner; for certainly never did religious teacher open his mouth, who spoke so perpetually about Himself as did the meek Jesus. I came' declares that He is the coming One,' and is really a claim to have voluntarily appeared among men, as well as to be the long-expected Messiah. With absolute decisiveness He states the purpose of His coming. He knows the meaning of His own work, which so few of us do, and it is safe to take His own account of what He intends, as it so seldom is. His opening declaration is singularly composed of blended humility and majesty. Its humility lies in His placing Himself, as it were, in line with previous messengers, and representing Himself as carrying on the sequence of divine revelation. It would not have been humble for anybody but Him to say that, but it was so for Him. Its majesty lies in His claim to fulfil' all former utterances from God. His fulfilment of the law properly so called is twofold.' first, in His own proper person and life, He completes obedience to it, realises its ideal; second, in His exposition of it, both by lip and life, He deepens and intensifies its meaning, changing it from a letterwhich regulates the actions, to a spirit which moves the inward man.
So these first words point to the peculiarity of His coming as being His own act, and make two daring assertions, as to His character, which He claims to be sinless, and as to His teaching, which he claims to be an advance upon all the former divine revelation. As to the former, He speaks here as He did to John, thus it becometh us to fulfil all righteousness.' No trace of consciousness of sin or defect appears in any words or acts of His. The calmest conviction that He was perfectly righteous is always manifest. How comes it that we are not repelled by such a tone? We do not usually admire self-complacent religious teachers. Why has nobody ever given Christ the lie, or pointed to His unconsciousness of faults as itself the gravest fault? Strange inaugural discourse for a humble sage and saint to assert his own immaculate perfection, stranger still that a listening world has said, Amen!' Note, too, the royal style here. In this part of the Sermon' our Lord twice uses the phrase, I say unto you,' which He once introduces with His characteristic verily.' Once He employs it to give solemnity to the asseveration which stretches forward to the end of this solid-seeming world, and once He introduces by it the stringent demand for His followers' loftier righteousness. His unsupported word is given us as our surest light in the dark future, His bare command as the most imperative authority. This style goes kingly; it calls for absolute credence and unhesitating submission. When He speaks, even if we have nothing but His word, it is ours neither to make reply' nor to reason why,' but simply to believe, and swiftly to do. Rabbis might split hairs and quote other rabbis by the hour; philosophers may argue and base their teachings on elaborate demonstrations; moralists may seek to sway the conscience through reason; legislators to appeal to fear and hope. He speaks, and it is done; He commands, and it stands fast. There is nothing else in the world the least like the superb and mysterious authority with which He fronts the world, and, as Fountain of knowledge and Source of obligation, summons us all to submit and believe, by that Verily, I say unto you.'
Matt. 5:18. Next we have to notice the exuberant testimony to the permanence of the law. Not the smallest of its letters, not even the little marks which distinguished some of them, or the flourishes at the top of some of them, should pass,--as we might say, not even the stroke across a written!,' which shows that it is not'.' The law shall last as long as the world. It shall last till it be accomplished. And what then? The righteousness which it requires can never be so realised that we shall not need to realise it any more, and in the new heavens righteousness dwelleth. But in a very real sense law shall cease when fulfilled. There is no law to him who can say, Thy law is within my heart.' When law has become both' law and impulse,' it has ceased to be law, in so far as it no longer stands over against the doer as an external constraint.
Matt. 5:19. On this permanence of the law Christ builds its imperative authority in His kingdom. Obviously, the kingdom of heaven' in Matt. 5:19 means the earthly form of that kingdom. The King republishes, as it were, the old code, and adopts it as the basis of His law. He thus assumes the absolute right of determining precedence and dignity in that kingdom. The sovereign is the fountain of honour,' whose word ennobles. Observe the merciful accuracy of the language. The breach of the commandments either in theory or in practice does not exclude from the kingdom, for it is, while realised on earth, a kingdom of sinful men aiming after holiness; but the smallest deflection from the law of right, in theory or in practice, does lower a man's standing therein, inasmuch as it makes him less capable of that conformity to the King, and consequent nearness to Him, which determines greatness and smallness there. Dignity in the kingdom depends on Christ-likeness, and Christlikeness depends on fulfilling, as He did, all righteousness. Small flaws are most dangerous because least noticeable. More Christian men lose their chance of promotion in the kingdom by a multitude of little sins than by single great ones, Matt. 5:20. As the King has Himself by His perfect obedience fulfilled the law, His subjects likewise must, in their obedience, transcend the righteousness of those who best knew and most punctiliously kept it. The scribes and Pharisees are not here regarded as hypocrites, but taken as types of the highest conformity with the law which the old dispensation afforded. The new kingdom demands a higher, namely a more spiritual and inward righteousness, one corresponding to the profounder meaning which the King gives to the old commandment. And this loftier fulfilment is not merely the condition of dignity in, but of entrance at all into, the kingdom.
Inward holiness is the essence of the character of all its subjects. How that holiness is to be ours is not here told, except in so far as it is hinted by the fact that it is regarded as the issue of the King's fulfilling the law. These last words would have been terrible and excluding if they had stood alone. When they follow I am come to fulfil,' they are a veiled gospel, implying that by His fulfilment the righteousness of the law is fulfilled in us.
