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. 16 and 21), 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 (Gal 4:22, Gal 4:23): For it is written, Abraham had two sons, etc. 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 (Gal 4:24-27): 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 54:1, 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 (Gal 4:28); 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 21:10), 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 (Gal 4:31), So then, brethren, we are not children of the bond-woman, but of the free.

But Jerusalem which is above - The apostle still follows the Jewish allegory, showing not only how the story of Hagar and Sarah, Ishmael and Isaac, was allegorized, but pointing out also that even Jerusalem was the subject of allegory; for it was a maxim among the rabbins, that "whatsoever was in the earth, the same was also found in heaven for there is no matter, howsoever small, in this world, that has not something similar to it in the spiritual world." On this maxim, the Jews imagine that every earthly thing has its representative in heaven; and especially whatever concerns Jerusalem, the law, and its ordinances. Rab. Kimchi, speaking of Melchizedec, king of Salem, says: זו ירושלם של מעלה zu Yerushalem shel malah, "This is the Jerusalem that is from above." This phrase frequently occurs among these writers, as may be seen in Schoettgen, who has written an express dissertation upon the subject. Hor. Hebr., vol. i. page 1205.

Is free, which is the mother of us all - There is a spiritual Jerusalem, of which this is the type; and this Jerusalem, in which the souls of all the righteous are, is free from all bondage and sin: or by this, probably, the kingdom of the Messiah was intended; and this certainly answers best to the apostle's meaning, as the subsequent verse shows. There is an earthly Jerusalem, but this earthly Jerusalem typifies a heavenly Jerusalem: the former, with all her citizens, is in bondage; the latter is a free city, and all her inhabitants are free also. And this Jerusalem is our mother; it signifies the Church of Christ, the metropolis of Christianity, or rather the state of liberty into which all true believers are brought. The word παντων, of all, is omitted by almost every MS. and version of antiquity and importance, and by the most eminent of the fathers who quote this place; it is undoubtedly spurious, and the text should be read thus: But Jerusalem, which is above, is free, which is our mother.

For it is written,.... Isa 44:1, which is cited to prove, that the heavenly Jerusalem, or Gospel church state, is the mother of us all, and has brought forth, and still will bring forth, many souls to Christ, even many more than were under the legal dispensation by the Jewish church, though the Lord was an husband to them, Jer 31:32. The words are,

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 an husband; by her that was "barren", and "bore" not, and "travailed" not, and was "desolate", is not meant the Gentile world, which before the coming of Christ was barren and destitute of the knowledge of him, and from among whom very few were called by grace; but the Gospel church in the first beginnings of it, in Christ's time, and especially about the time of his death, and before the pouring forth of the Spirit on the day of Pentecost, when the number of its members were few; for the names of the disciples together were but 120, when it seemed to be barren, and desolate, and deprived of its husband Christ, but was quickly to have a large accession to, it, both of Jews and Gentiles; and therefore is called upon to "rejoice, break forth", and "cry"; that is, to break forth into songs of praise, and express her spiritual joy, by singing aloud, and setting forth in hymns and spiritual songs the glory of powerful and efficacious grace, in the conversion of such large numbers of souls, the like of which had never been known under the former administration. Three thousand were converted under one sermon, and added to this first Gospel church; and the number of its members still increased, and the number of the men that afterwards believed was about five thousand; and after this we hear of more believers being added to the Lord, both men and women; and also that a great company of the priests were obedient to the faith; and when out of this church, the apostles, and other preachers of the Gospel went everywhere into the Gentile world, thousands of souls were converted, and a large number of churches formed, and a spiritual seed has been preserved ever since; and in the latter day Zion will travail in birth, and bring forth a numerous offspring; a nation shall be born at once, and the fulness of the Gentiles shall be brought in. Agreeably to this sense the Jewish writers, Jarchi, Kimchi, and Aben Ezra, understand this passage of Jerusalem; as does also the Chaldee paraphrase, which renders it thus:

"Praise, O Jerusalem, which was as a barren woman that bringeth not forth; rejoice in praise, and be glad, who was as a woman which conceives not, for more are the children of Jerusalem forsaken than the children of the habitable city, saith the Lord.''

This verse stands instead of the sentence which we should expect, to correspond to Gal 4:24, "One from Mount Sinai," namely, the other covenant from the heavenly mount above, which is (answers in the allegory to) Sarah.

Jerusalem . . . above-- (Heb 12:22), "the heavenly Jerusalem." "New Jerusalem, which cometh down out of heaven from my God" (Rev 3:12; Rev 21:2). Here "the Messianic theocracy, which before Christ's second appearing is the Church, and after it, Christ's kingdom of glory" [MEYER].

free--as Sarah was; opposed to "she is in bondage" (Gal 4:25).

all--omitted in many of the oldest manuscripts, though supported by some. "Mother of us," namely, believers who are already members of the invisible Church, the heavenly Jerusalem, hereafter to be manifested (Heb 12:22).