Strong's Exhaustive Concordance (James Strong, 1890/1894), public domain; digitized by Open Scriptures (CC BY-SA). KJV word tagging: eBible.org (public domain). Original-language text, parsing and brief lexicon: STEPBible.org data from Tyndale House, Cambridge (CC BY 4.0).
Cross-references
Philippians 3:18 (For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ:
Psalms 119:136 Rivers of waters run down mine eyes, because they keep not thy law.
Jeremiah 13:17 But if ye will not hear it, my soul shall weep in secret places for your pride; and mine eye shall weep sore, and run down with tears, becau…
Lamentations 3:51 Mine eye affecteth mine heart because of all the daughters of my city.
Romans 10:1 Brethren, my heart’s desire and prayer to God for Israel is, that they might be saved.
Luke 19:41-44 And when he was come near, he beheld the city, and wept over it,
Jeremiah 9:1 Oh that my head were waters, and mine eyes a fountain of tears, that I might weep day and night for the slain of the daughter of my people!
Lamentations 3:48-49 Mine eye runneth down with rivers of water for the destruction of the daughter of my people.
Cross-references from OpenBible.info (CC BY), in the lineage of the Treasury of Scripture Knowledge (public domain).
Commentary
Jamieson-Fausset-Brown on Romans 9:2
That I have, &c.--"That I have great grief (or, sorrow) and unceasing anguish in my heart"--the bitter hostility of his nation to the glorious Gospel, and the awful consequences of their unbelief, weighing heavily and incessantly upon his spirit.
Adam Clarke on Romans 9:1
I say the truth in Christ, I lie not - This is one of the most solemn oaths any man can possibly take. He appeals to Christ as the searcher of hearts that he tells the truth; asserts that his conscience was free from all guile in this matter, and that the Holy Ghost bore him testimony that what he said was true. Hence we find that the testimony of a man's own conscience, and the testimony of the Holy Ghost, are two distinct things, and that the apostle had both at the same time.
As the apostle had still remaining a very awful part of his commission to execute, namely, to declare to the Jews not only that God had chosen the Gentiles, but had rejected them because they had rejected Christ and…
That I have great heaviness and continual sorrow in my heart. This is the thing he appeals to Christ for the truth of, and calls in his conscience and the Holy Ghost to bear witness to. These two words, "heaviness" and "sorrow", the one signifies grief, which had brought on heaviness on his spirits; and the other such pain as a woman in travail feels: and the trouble of his mind expressed by both, is described by its quantity, "great", it was not a little, but much; by its quality it was internal, it was in his "heart", it did not lie merely in outward show, in a few words or tears, but was in his heart, it was a heart sorrow; and by its duration, "continual", it was not a sudden emotion or…
Romans 9:1-5
1. I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost,
1. Veritatem dico in Christo, non mentior, testimonium simul mihi reddente mea conscientia eum Spiri-tu sancto,
2. That I have great heaviness and continual sorrow in my heart.
2. Quod dolor sit mihi magnus, et assiduus cruciatus cordi meo:
3. For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh:
3. Optarim enim ego ipse anathema esse a Christo pro fratribus meis, cognatis inquam meis secundum car-nem;
4. Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and t…
The Church Fathers
The construction here is incomplete. Paul should have added that his unceasing anguish was due to the rejection or unbelief of the Jews.
Since it appears that earlier he was speaking against the Jews, who thought that they were justified by the law, Paul now shows his desire and love for them and says that his conscience bears witness in Christ Jesus and in the Holy Spirit.
Because Paul intends to proceed against the Jews, he first assures them that he does not speak out of hatred for them, but out of love, for it pains him that they do not believe in Christ, who had come to save them as soon as possible.
The Church Fathers: public-domain translations (Ante-Nicene and Nicene and Post-Nicene Fathers), verse-indexed by SermonIndex (CC BY 4.0).
Dictionary and topics
Jews, The · National character of: Fondness for their brethren — National character of: Fondness for their brethren
Love To Man · Should be exhibited, toward: Fellow-countrymen — Should be exhibited, toward: Fellow-countrymen
Dictionary: Easton's (1897) and Smith's (1863), public domain. Topics: Nave's Topical Bible (1896) and Torrey's Topical Textbook (1897), public domain. Both as parsed by NEUU (CC BY 4.0).
Paul does not explicitly say why he has such bitter sorrow for his Jewish brothers and sisters. Yet his willingness to become cursed on their behalf if that would save them makes clear that the failure of most Jews to respond to Jesus and be saved stimulated his agony (see also 10:1).