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1 This is the book of the commandments of God, and the law that endureth for ever: all they that keep it shall come to life; but such as leave it shall die. 2 Turn thee, O Jacob, and take hold of it: walk in the presence of the light thereof, that thou mayest be illuminated. 3 Give not thine honour to another, nor the things that are profitable unto thee to a strange nation. 4 O Israel, happy are we: for things that are pleasing to God are made known unto us. 5 Be of good cheer, my people, the memorial of Israel. 6 Ye were sold to the nations, not for [your] destruction: but because ye moved God to wrath, ye were delivered unto the enemies. 7 For ye provoked him that made you by sacrificing unto devils, and not to God. 8 Ye have forgotten the everlasting God, that brought you up; and ye have grieved Jerusalem, that nursed you. 9 For when she saw the wrath of God coming upon you, she said, Hearken, O ye that dwell about Sion: God hath brought upon me great mourning; 10 For I saw the captivity of my sons and daughters, which the Everlasting brought upon them. 11 With joy did I nourish them; but sent them away with weeping and mourning. 12 Let no man rejoice over me, a widow, and forsaken of many, who for the sins of my children am left desolate; because they departed from the law of God. 13 They knew not his statutes, nor walked in the ways of his commandments, nor trod in the paths of discipline in his righteousness. 14 Let them that dwell about Sion come, and remember ye the captivity of my sons and daughters, which the Everlasting hath brought upon them. 15 For he hath brought a nation upon them from far, a shameless nation, and of a strange language, who neither reverenced old man, nor pitied child. 16 These have carried away the dear beloved children of the widow, and left her that was alone desolate without daughters. 17 But what can I help you? 18 For he that brought these plagues upon you will deliver you from the hands of your enemies. 19 Go your way, O my children, go your way: for I am left desolate. 20 I have put off the clothing of peace, and put upon me the sackcloth of my prayer: I will cry unto the Everlasting in my days. 21 Be of good cheer, O my children, cry unto the Lord, and he will deliver you from the power and hand of the enemies. 22 For my hope is in the Everlasting, that he will save you; and joy is come unto me from the Holy One, because of the mercy which shall soon come unto you from the Everlasting our Saviour. 23 For I sent you out with mourning and weeping: but God will give you to me again with joy and gladness for ever. 24 Like as now the neighbours of Sion have seen your captivity: so shall they see shortly your salvation from our God which shall come upon you with great glory, and brightness of the Everlasting. 25 My children, suffer patiently the wrath that is come upon you from God: for thine enemy hath persecuted thee; but shortly thou shalt see his destruction, and shalt tread upon his neck. 26 My delicate ones have gone rough ways, and were taken away as a flock caught of the enemies. 27 Be of good comfort, O my children, and cry unto God: for ye shall be remembered of him that brought these things upon you. 28 For as it was your mind to go astray from God: so, being returned, seek him ten times more. 29 For he that hath brought these plagues upon you shall bring you everlasting joy with your salvation. 30 Take a good heart, O Jerusalem: for he that gave thee that name will comfort thee. 31 Miserable are they that afflicted thee, and rejoiced at thy fall. 32 Miserable are the cities which thy children served: miserable is she that received thy sons. 33 For as she rejoiced at thy ruin, and was glad of thy fall: so shall she be grieved for her own desolation. 34 For I will take away the rejoicing of her great multitude, and her pride shall be turned into mourning. 35 For fire shall come upon her from the Everlasting, long to endure; and she shall be inhabited of devils for a great time. 36 O Jerusalem, look about thee toward the east, and behold the joy that cometh unto thee from God. 37 Lo, thy sons come, whom thou sentest away, they come gathered together from the east to the west by the word of the Holy One, rejoicing in the glory of God.
[AD 215] Clement of Alexandria on Baruch 4:4
He clearly calls us to goodness by Solomon when he says, “Blessed is the one who has found wisdom and the mortal who has found understanding.” “For goodness is found by him who seeks it and is likely to be seen by him who has found it.” By Jeremiah, too, he sets forth prudence when he says, “Blessed are we, Israel; for what is pleasing to God is known by us”—and it is known by the Word, by whom we are blessed and wise. For wisdom and knowledge are mentioned by the same prophet when he says, “Hear, O Israel, the commandments of life, and listen to know understanding.”

[AD 600] Olympiodorus of Alexandria on Baruch 4:4
He urges the Israelites to be the first to take hold of grace. In fact, “it was necessary that the Word of God first be announced to them.” The spiritual Israel speaks in this way, to whom the Savior addresses himself, saying, “Blessed are your eyes because they see, and your ears, because they hear.”

[AD 600] Olympiodorus of Alexandria on Baruch 4:6
The devil in fact had a written note for our debt, but Christ redeemed us with his own blood.

[AD 407] John Chrysostom on Baruch 4:7
“And my people has not understood me.” They have not understood me, he says, that I am more brilliant than the sun. “Woe to a sinful people.” This also is typical of the prophets, to grieve over one who is sick with an incurable illness. Jeremiah does this in many places, and Christ as well, saying, “Woe to you, Chorazin, woe to you, Bethsaida,” because this also is a form of instruction. In fact, one who has not been brought back by reasoning can often be corrected by someone’s grief. “People full of sins.” Another accusation: all are so, and gravely. “Perverse race.” He does not accuse their birth but indicates that their wickedness began from the earliest age. Just as John, when he said, “serpents, children of vipers,” did not depreciate their nature (otherwise he would not have said, “Produce fruit, then, worthy of repentance,” if they had been such by nature and by birth), so also here, in saying “Perverse race,” the prophet does not accuse their birth. “Lawless children.” He did not say, “outside of the law,” but “without law,” with a disposition in no way better than those who had received no law at all, thus showing that the difference is in their previous choice. “You have abandoned the Lord, angering him.” He said this expressively: the name of God would have been enough to establish the accusation. It is what Jeremiah reproves, saying, “Since they have departed from him and are drawn near to demons.” “The Holy One of Israel.” This is the culmination of the accusation, by the fact that though he was the common Lord of all, it was to them that he had made himself known.

[AD 600] Olympiodorus of Alexandria on Baruch 4:12
He calls her a widow because she was without the divine care, alone and desolate—clearly she who is now alone. Or, furthermore, the only one to have had the divine temple. Or the only one to have been encircled by the Assyrians but not conquered, because in fact “the Lord tried me harshly but did not give me over to death.” But above all it is the synagogue that deserves the name widow, which, having acted arrogantly toward Christ her spouse, has been abandoned.

[AD 600] Olympiodorus of Alexandria on Baruch 4:15
God “removed our sins from us,” but we are attracted to them, and for them we are punished. It says that he sends, because nothing happens without God’s consent. The “perverse nation” was first the Babylonians, then the Romans. This can also be understood as those who teach false knowledge, resorting to the deceptions of the sophists.

[AD 600] Olympiodorus of Alexandria on Baruch 4:19
I remain alone because of God’s absence. This could have been said by the saints, who made the condition of sinners their own; or by the synagogue of the Jews, when because of its arrogance toward Christ it was said to it, “See, your house will be left desolate”; or by the city, because of the desolation of the inhabitants.

[AD 373] Athanasius of Alexandria on Baruch 4:20
Paul reasonably has said, “his eternal power and godhead,” thereby signifying the Son. He said this while accusing the Greeks of contemplating the harmony and order of the creation without reflecting on the framing Word within it (for the creatures witness to their own Framer) so as through the creation to apprehend the true God and abandon their worship of it. And where the sacred writers say, “who exists before the ages,” and, “by whom he made the ages,” they thereby as clearly preach the eternal and everlasting being of the Son, even while they are designating God. Thus, if Isaiah says, “The everlasting God, the creator of the ends of the earth,” and Susanna said, “O everlasting God,” and Baruch wrote, “I will cry unto the Everlasting in my days,” and shortly after, “My hope is in the Everlasting, that he will save you, and joy is come to me from the Holy One,” yet as the apostle, writing to the Hebrews, says, “who being the radiance of his glory and the expression of his person,” and David too in the psalm, “And the brightness of the Lord be on us,” and, “In your light shall we see light,” who has so little sense as to doubt of the eternity of the Son?

[AD 397] Ambrose of Milan on Baruch 4:26
How great is the providence of the Lord! Where there is a fruit of a softer quality, the thickness of the leaves offers a more protective covering for its defense, as we see in the example of the fig tree. Therefore the more delicate creatures must be protected from the other sturdier ones, as the same Lord teaches by the mouth of Jeremiah, saying, “Like these good figs, thus I will regard the deported ones of Judah that I have sent from this place into the land of the Chaldeans for their good and will fix my eyes on them for their good.” In fact, when they were exposed to offenses he encircled them, so to speak, with a more protective covering of his mercy so that those tender fruits would not perish prematurely. Moreover, he later on also says about them, “The creatures of my possession have walked rough ways,” and he says more to them further on, “Be brave, my children, and cry to the Lord.” This is the sole inviolable protection, the impregnable defense against all the storms and the injuries. Where there are delicate fruits, the protection and the defense of the leaves is thicker; on the contrary, where there are more resistant fruits, there the leaves are more delicate, as in the case of the apple.

[AD 600] Olympiodorus of Alexandria on Baruch 4:30
That is, the Word of God, who became incarnate for us and made the church worthy to be called his spouse.

[AD 202] Irenaeus on Baruch 4:36
Jeremiah the prophet has pointed out that as many believers as God has prepared for this purpose, to multiply those left on earth, should both be under the rule of the saints to minister to his Jerusalem and that his kingdom shall be in it, saying, “Look around Jerusalem towards the east, and behold the joy that comes to you from God. Behold, your children shall come whom you have sent forth; they shall come in a band from the east even to the west by the word of that Holy One, rejoicing in that splendor from your God.” Now all these things being such as they are, they cannot be understood in reference to supercelestial matters, “for God,” it is said, “will show the whole earth that is under heaven your glory.” But in the times of the kingdom, the earth has been called again by Christ to its pristine condition, and Jerusalem will be rebuilt after the pattern of Jerusalem above, of which the prophet Isaiah says, “Behold, I have depicted your walls on my hands, and you are always in my sight. John, the Lord’s disciple, says that the new Jerusalem above shall then descend, as a bride adorned for her husband, and that this is the tabernacle of God, in which God will dwell with humanity. Of this Jerusalem the former one is an image—the Jerusalem of the former earth in which the righteous are disciplined beforehand for incorruption and prepared for salvation.

[AD 600] Olympiodorus of Alexandria on Baruch 4:36
Look toward the sun of justice, toward our Lord Jesus Christ.