Romans 9 is going to prove Justification and Salvation are our as we have faith in God not any other.  It is not by the works of the law, but now grace which give us the assurance needed to know we are in the light. This is seeing the power of predestination applied to all as all people matter to God.
9 I am telling the truth because I belong to Christ. The Holy Spirit tells my heart that I am not lying. Thank the Lord He is still the way, truth and life and we are assured of it as we abide in the vine; Jesus. To know the Holy Spirit is real is to be able to talk in His tongue, not the tongue of a nation but the family of God. It seems like tongues in Acts 2:4 And they were all filled with the Holy Ghost, and began to speak in other tongues, as the Spirit gave them utterance. This is not normal this is heavenly language that comes for the Spirit of God Himself. One has to experience what it is like in order to appreciate what God can do in our minds that control the tongue. We all speak the language normally the way our parents talk an d now we are apart of the family of God it is natural to talk in His language or tongue.  ² I have much sorrow. The pain in my heart never leaves. As Christians we hurt every time we experience rejection of the Spirit of God and the pain never goes away for we want other to experience God wonder and grace to forgive. ³ I could even wish that I might be kept from being with Christ if that would help my people to be saved from the punishment of sin. Here Paul is willing to sacrifice what he has to save someone else from the punishment of sin, willing to give his life that others might be saved. Remember Moses said in Exodus 32:31-32 and Moses returned unto the Lord, and said, Oh, this people have sinned a great sin, and have made them gods of gold. Yet now, if thou wilt forgive their sin, and if not, blot me out of thy book which thou hast written. These are strong words of dedication and commitment to the Lord in the natural realm.They are of my own flesh and blood. Lord help us to see that life is very personal and our tongues are our tongues to speak the way we want and how we feel. It is very difficult to put one in the same package as someone else. In fact, it is impossible for us to explain how someone reacts to the experience others have? Lord help me to relax in what I have experience as I abide in You. ⁴ They are Jews and are the people God chose for Himself. He shared His shining-greatness with them and gave them His Law and a way to worship. They have His promises. These are Jews Gods seed from Abraham and Jacob His chosen adopted into the family of God. Not their own but Gods as they obey the law to keep happy and blessed. Giving the right to glory in Gods ark of the covenant between the Cherubim and at Sinai the law. This was the glory of Israel to be guided by the Cloud by day and the fire at night. It is a covenant of peculiarity or strange as it is a type of grace by the giving of the law, Obey the law and receive forgiveness by grace.  The Jews had the temple, altars, priest, sacrifices, feasts and the institution relating to them to be honored above all else. They knew they were serving the true God not under bandage of sins rule by Rome. Thank the Lord their imagination, memory, consequences, reason were all wrapped up in affection towards God as their spirits worshipped, reverenced, faith and hope in God to answer their prayers. It was the law that gave them assurance of being delivered from evil. ⁵ The early preachers came from this family. Christ Himself was born of flesh from this family and He is over all things. May God be honored and thanked forever. Let it be so. Abraham, Isaac, and Jacob were followers of God and where the early preachers. For God blessed them in their humanity and made them Spiritual being as they obeyed the law. So, God sent His Son Jesus to live among is but in the Old Testament He revealed the law to Moses which was given by God to be obeyed and when people did they were blessed beyond measure. Here Jesus came as a Jewish man that was born as a human baby devoted to doing His Father Gods business. This was very humbling for here He was a part of the God head becoming a man, all for the sake of His following as a human being His Father He could be dedicated to His Fathers will and not His own. It seems like greater the suffering the greater the blessing the Lord becomes to those who put their trust in the Lord. It seems like suffering is a part of our lives and it allows us to call upon the Lord so He can give us the assurance all is going to be OK for He is in control. All we have to do is let Him rule and reign in our lives.
⁶ I am not saying that God did not keep His promises. Not all the Jews are people God chose for Himself. God has not nor will not lie, Ishmael Haggar son given to Abraham by his wife did, so did Esau for he trespassed and sinned against God. Lord help us to keep our word for it is our life. Lord help us in this age of Grace to make sure we keep abiding in the vine so we can bear good fruit good for all including praying for our enemies. Everyone God created is not good for some do not want God to rule and reign for they want to  be like god able to do whatever they want. The Jews are Gods so is the Church as long as we trust and obey His law, His way, His truth and life, staying away for our way, or our truth an life.