Romans 9:1

“I say the truth in Christ, I lie not, etc..] The apostle being about to discourse concerning predestination, which he had mentioned in the preceding chapter, and to open the springs and causes of it, and also concerning the induration and rejection of the Jewish nation; he thought it necessary to preface his account of these things with some strong assurances of his great attachment to that people, and his affection for them, lest it should be thought he spoke out of prejudice to them; and well knowing in what situation he stood in with them, on account of his preaching up the abrogation of the ceremonial law, and how difficult it might be for him to obtain their belief in what he should…”

“THE BEARING OF THE FOREGOING TRUTHS UPON THE CONDITION AND DESTINY OF THE CHOSEN PEOPLE--ELECTION--THE CALLING OF THE GENTILES. (Rom. 9:1-33) I say the truth in Christ--as if steeped in the spirit of Him who wept over impenitent and doomed Jerusalem (compare Rom 1:9; Co2 12:19; Phi 1:8). my conscience bearing me witness in the Holy Ghost--"my conscience as quickened, illuminated, and even now under the direct operation of the Holy Ghost."”

“I say the truth - In what I am about to affirm respecting my attachment to the nation and people. In Christ - Most interpreters regard this as a form of an oath, as equivalent to calling Christ to witness. It is certainly to be regarded, in its obvious sense, as an appeal to Christ as the searcher of the heart, and as the judge of falsehood. Thus, the word translated “in” ἐν en is used in the form of an oath in Matthew 5:34-36; Revelation 10:6, Greek. We are to remember that the apostle was addressing those who had been Jews; and the expression has all the force of an oath “by the Messiah.” This shows that it is right on great and solemn occasions, and in a solemn manner, and thus only, to…”

“In Christ - This seems to imply an appeal to him. In the Holy Ghost - Through his grace. Romans 9:2”

“9:1–11:36 In this section, Paul takes up the problem raised by the unbelief of so many Jews. If God had promised salvation to Israel yet so few Jews were being saved, how could Jesus truly be the fulfillment of God’s plan (9:1-5)? In his response to this objection, Paul cites the Old Testament as evidence that God had always intended to save only a remnant of Israel (9:6-29), and he faults the Jews for refusing to embrace Christ (9:30–10:21). Paul then shows that God has not discarded Israel from his plan of salvation. Many Jews have already believed in Christ (11:1-10), and many more will believe in the future (11:12-26).”

“I say: Rom 1:9; Co2 1:23, Co2 11:31, Co2 12:19; Gal 1:20; Phi 1:8; Th1 2:5; Ti1 2:7, Ti1 5:21 my conscience: Rom 2:15, Rom 8:16; Co2 1:12; Ti1 1:5; Jo1 3:19-21 Romans 9:2”