21 Tell me, ye that desire to be under the law, do ye not hear the law?   22 For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.   23 But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.   24 Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.   25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.   26 But Jerusalem which is above is free, which is the mother of us all.   27 For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath a husband.   28 Now we, brethren, as Isaac was, are the children of promise.   29 But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now.   30 Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.   31 So then, brethren, we are not children of the bondwoman, but of the free.

      In these verses the apostle illustrates the difference between believers who rested in Christ only and those judaizers who trusted in the law, by a comparison taken from the story of Isaac and Ishmael. This he introduces in such a manner as was proper to strike and impress their minds, and to convince them of their great weakness in departing from the truth, and suffering themselves to be deprived of the liberty of the gospel: Tell me, says he, you that desire to be under the law, do you not hear the law? He takes it for granted that they did hear the law, for among the Jews it was wont to be read in their public assemblies every sabbath day; and, since they were so very fond of being under it, he would have them duly to consider what is written therein (referring to what is recorded Gen. xvi. and xxi.), for, if they would do this, they might soon see how little reason they had to trust in it. And here, 1. He sets before them the history itself (v. 22, 23): For it is written, Abraham had two sons, &c. Here he represents the different state and condition of these two sons of Abraham--that the one, Ishmael, was by a bond-maid, and the other, Isaac, by a free-woman; and that whereas the former was born after the flesh, or by the ordinary course of nature, the other was by promise, when in the course of nature there was no reason to expect that Sarah should have a son. 2. He acquaints them with the meaning and design of this history, or the use which he intended to make of it (v. 24-27): These things, says he, are an allegory, wherein, besides the literal and historical sense of the words, the Spirit of God might design to signify something further to us, and that was, That these two, Agar and Sarah, are the two covenants, or were intended to typify and prefigure the two different dispensations of the covenant. The former, Agar, represented that which was given from mount Sinai, and which gendereth to bondage, which, though it was a dispensation of grace, yet, in comparison of the gospel state, was a dispensation of bondage, and became more so to the Jews, through their mistake of the design of it, and expecting to be justified by the works of it. For this Agar is mount Sinai in Arabia (mount Sinai was then called Agar by the Arabians), and it answereth to Jerusalem which now is, and is in bondage with her children; that is, it justly represents the present state of the Jews, who, continuing in their infidelity and adhering to that covenant, are still in bondage with their children. But the other, Sarah, was intended to prefigure Jerusalem which is above, or the state of Christians under the new and better dispensation of the covenant, which is free both from the curse of the moral and the bondage of the ceremonial law, and is the mother of us all--a state into which all, both Jews and Gentiles, are admitted, upon their believing in Christ. And to this greater freedom and enlargement of the church under the gospel dispensation, which was typified by Sarah the mother of the promised seed, the apostle refers that of the prophet, Isa. liv. 1, where it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not; for the desolate hath many more children than she who hath a husband. 3. He applies the history thus explained to the present case (v. 28); Now we, brethren, says he, as Isaac was, are the children of the promise. We Christians, who have accepted Christ, and rely upon him, and look for justification and salvation by him alone, as hereby we become the spiritual, though we are not the natural, seed of Abraham, so we are entitled to the promised inheritance and interested in the blessings of it. But lest these Christians should be stumbled at the opposition they might meet with from the Jews, who were so tenacious of their law as to be ready to persecute those who would not submit to it, he tells them that this was no more than what was pointed to in the type; for as then he that was born after the flesh persecuted him that was born after the Spirit, they must expect it would be so now. But, for their comfort in this case, he desires them to consider what the scripture saith (Gen. xxi. 10), Cast out the bond-woman and her son, for the son of the bond-woman shall not be heir with the son of the free-woman. Though the judaizers should persecute and hate them, yet the issue would be that Judaism would sink, and wither, and perish; but true Christianity should flourish and last for ever. And then, as a general inference from the whole of the sum of what he had said, he concludes (v. 31), So then, brethren, we are not children of the bond-woman, but of the free.

      18 For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest,   19 And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more:   20 (For they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart:   21 And so terrible was the sight, that Moses said, I exceedingly fear and quake:)   22 But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels,   23 To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect,   24 And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.   25 See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape, if we turn away from him that speaketh from heaven:   26 Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven.   27 And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain.   28 Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear:   29 For our God is a consuming fire.

      Here the apostle goes on to engage the professing Hebrews to perseverance in their Christian course and conflict, and not to relapse again into Judaism. This he does by showing them how much the state of the gospel church differs from that of the Jewish church, and how much it resembles the state of the church in heaven, and on both accounts demands and deserves our diligence, patience, and perseverance in Christianity.

      I. He shows how much the gospel church differs from the Jewish church, and how much it excels. And here we have a very particular description of the state of the church under the Mosaic dispensation, v. 18-21. 1. It was a gross sensible state. Mount Sinai, on which that church-state was constituted, was a mount that might be touched (v. 18), a gross palpable place; so was the dispensation. It was very much external and earthly, and so more heavy. The state of the gospel church on mount Zion is more spiritual, rational, and easy. 2. It was a dark dispensation. Upon that mount there were blackness and darkness, and that church-state was covered with dark shadows and types: the gospel state is much more clear and bright. 3. It was a dreadful and terrible dispensation; the Jews could not bear the terror of it. The thunder and the lightning, the trumpet sounding, the voice of God himself speaking to them, struck them with such dread that they entreated that the word might not be so spoken to them any more, v. 19. Yea, Moses himself said, I exceedingly fear and quake. The best of men on earth are not able to converse immediately with God and his holy angels. The gospel state is mild, and kind, and condescending, suited to our weak frame. 4. It was a limited dispensation; all might not approach to that mount, but only Moses and Aaron. Under the gospel we have all access with boldness to God. 5. It was a very dangerous dispensation. The mount burned with fire, and whatever man or beast touched the mount must be stoned, or thrust through with a dart, v. 20. It is true, it will be always dangerous for presumptuous and brutish sinners to draw night to God; but it is not immediate and certain death, as here it was. This was the state of the Jewish church, fitted to awe a stubborn and hard-hearted people, to set forth the strict and tremendous justice of God, to wean the people of God from that dispensation, and induce them more readily to embrace the sweet and gentle economy of the gospel church, and adhere to it.

      II. He shows how much the gospel church represents the church triumphant in heaven, what communication there is between the one and the other. The gospel church is called mount Zion, the heavenly Jerusalem, which is free, in opposition to mount Sinai, which tendeth to bondage, Gal. iv. 24. This was the hill on which God set his king the Messiah. Now, in coming to mount Zion, believers come into heavenly places, and into a heavenly society.

      1. Into heavenly places. (1.) Unto the city of the living God. God has taken up his gracious residence in the gospel church, which on that account is an emblem of heaven. There his people may find him ruling, guiding, sanctifying, and comforting them; there he speaks to them by the gospel ministry; there they speak to him by prayer, and he hears them; there he trains them up for heaven, and gives them the earnest of their inheritance. (2.) To the heavenly Jerusalem as born and bred there, as free denizens there. Here believers have clearer views of heaven, plainer evidences for heaven, and a greater meetness and more heavenly temper of soul.

      2. To a heavenly society. (1.) To an innumerable company of angels, who are of the same family with the saints, under the same head, and in a great measure employed in the same work, ministering to believers for their good, keeping them in all their ways, and pitching their tents about them. These for number are innumerable, and for order and union are a company, and a glorious one. And those who by faith are joined to the gospel church are joined to the angels, and shall at length be like them, and equal with them. (2.) To the general assembly and church of the first-born, that are written in heaven, that is, to the universal church, however dispersed. By faith we come to them, have communion with them in the same head, by the same Spirit, and in the same blessed hope, and walk in the same way of holiness, grappling with the same spiritual enemies, and hasting to the same rest, victory, and glorious triumph. Here will be the general assembly of the first-born, the saints of former and earlier times, who saw the promises of the gospel state, but received them not, as well as those who first received them under the gospel, and were regenerated thereby, and so were the first-born, and the first-fruits of the gospel church; and thereby, as the first-born, advanced to greater honours and privileges than the rest of the world. Indeed all the children of God are heirs, and every one has the privileges of the first-born. The names of these are written in heaven, in the records of the church here: they have a name in God's house, are written among the living in Jerusalem; they have a good repute for their faith and fidelity, and are enrolled in the Lamb's book of life, as citizens are enrolled in the livery-books. (3.) To God the Judge of all, that great God who will judge both Jew and Gentile according to the law they are under: believers come to him now by faith, make supplication to their Judge, and receive a sentence of absolution in the gospel, and in the court of their consciences now, by which they know they shall be justified hereafter. (4.) To the spirits of just men made perfect; to the best sort of men, the righteous, who are more excellent than their neighbours; to the best part of just men, their spirits, and to these in their best state, made perfect. Believers have union with departed saints in one and the same head and Spirit, and a title to the same inheritance, of which those on earth are heirs, those in heaven possessors. (5.) To Jesus the Mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel. This is none of the least of many encouragements there are to perseverance in the gospel state, since it is a state of communion with Christ the Mediator of the new covenant, and of communication of his blood, that speaketh better things than the blood of Abel. [1.] The gospel covenant is the new covenant, distinct from the covenant of works; and it is now under a new dispensation, distinct from that of the Old Testament. [2.] Christ is the Mediator of this new covenant; he is the middle person that goes between both parties, God and man, to bring them together in this covenant, to keep them together notwithstanding the sins of the people and God's displeasure against them for sin, to offer up our prayers to God, and to bring down the favours of God to us, to plead with God for us and to plead with us for God, and at length to bring God and his people together in heaven, and to be a Mediator of fruition between them for ever, they beholding and enjoying God in Christ and God beholding and blessing them in Christ. [3.] This covenant is ratified by the blood of Christ sprinkled upon our consciences, as the blood of the sacrifice was sprinkled upon the altar and the sacrifice. This blood of Christ pacifies God and purifies the consciences of men. [4.] This is speaking blood, and it speaks better things than that of Abel. First, It speaks to God in behalf of sinners; it pleads not for vengeance, as the blood of Abel did on him who shed it, but for mercy. Secondly, To sinners, in the name of God. It speaks pardon to their sins, peace to their souls; and bespeaks their strictest obedience and highest love and thankfulness.

      III. The apostle, having thus enlarged upon the argument to perseverance taken from the heavenly nature of the gospel church state, closes the chapter by improving the argument in a manner suitable to the weight of it (v. 25, &c.): See then that you refuse not him that speaketh--that speaketh by his blood; and not only speaketh after another manner than the blood of Abel spoke from the ground, but than God spoke by the angels, and by Moses spoke on mount Sinai; then he spoke on earth, now he speaks from heaven. Here observe,

      1. When God speaks to men in the most excellent manner he justly expects from them the most strict attention and regard. Now it is in the gospel that God speaks to men in the most excellent manner. For, (1.) He now speaks from a higher and more glorious seat and throne, not from mount Sinai, which was on this earth, but from heaven. (2.) He speaks now more immediately by his inspired word and by his Spirit, which are his witnesses. He speaks not now any new thing to men, but by his Spirit speaks the same word home to the conscience. (3.) He speaks now more powerfully and effectually. Then indeed his voice shook the earth, but now, by introducing the gospel state, he hath shaken not only the earth, but the heavens,--not only shaken the hills and mountains, or the spirits of men, or the civil state of the land of Canaan, to make room for his people,--not only shaken the world, as he then did, but he hath shaken the church, that is, the Jewish nation, and shaken them in their church-state, which was in Old-Testament times a heaven upon earth; this their heavenly spiritual state he hath now shaken. It is by the gospel from heaven that God shook to pieces the civil and ecclesiastical state of the Jewish nation, and introduced a new state of the church, that cannot be removed, shall never be changed for any other on earth, but shall remain till it be made perfect in heaven.

      2. When God speaks to men in the most excellent manner, the guilt of those who refuse him is the greater, and their punishment will be more unavoidable and intolerable; there is no escaping, no bearing it, v. 25. The different manner of God's dealing with men under the gospel, in a way of grace, assures us that he will deal with the despisers of the gospel after a different manner than he does with other men, in a way of judgment. The glory of the gospel, which should greatly recommend it to our regard, appears in these three things:-- (1.) It was by the sound of the gospel trumpet that the former dispensation and state of the church of God were shaken and removed; and shall we despise that voice of God that pulled down a church and state of so long standing and of God's own building? (2.) It was by the sound of the gospel trumpet that a new kingdom was erected for God in the world, which can never be so shaken as to be removed. This was a change made once for all; no other change shall take place till time shall be no more. We have now received a kingdom that cannot be moved, shall never be removed, never give way to any new dispensation. The canon of scripture is now perfected, the Spirit of prophecy has ceased, the mystery of God is finished, he has put his last hand to it. The gospel church may be made more large, more prosperous more purified from contracted pollution, but it shall never be altered for another dispensation; those who perish under the gospel perish without remedy. And hence the apostle justly concludes, [1.] How necessary it is for us to obtain grace from God, to serve him acceptably: if we be not accepted of God under this dispensation, we shall never be accepted at all; and we lose all our labour in religion if we be not accepted of God. [2.] We cannot worship God acceptably, unless we worship him with godly reverence and fear. As faith, so holy fear, is necessary to acceptable worship. [3.] It is only the grace of God that enables us to worship God in a right manner: nature cannot come up to it; it can produce neither that precious faith nor that holy fear that is necessary to acceptable worship. [4.] God is the same just and righteous God under the gospel that he appeared to be under the law. Though he be our God in Christ, and now deals with us in a more kind and gracious way, yet he is in himself a consuming fire; that is, a God of strict justice, who will avenge himself on all the despisers of his grace, and upon all apostates. Under the gospel, the justice of God is displayed in a more awful manner, though not in so sensible a manner as under the law; for here we behold divine justice seizing upon the Lord Jesus Christ, and making him a propitiatory sacrifice, his soul and body an offering for sin, which is a display of justice far beyond what was seen and heard on mount Sinai when the law was given.