Romans 10:1-13
The Jews’ zeal and sincerity does not lead them to salvation. The broader principle is that many sincere, “religious” people are wrong in their beliefs.
There is a certain sense in which this verse is terrifying. Paul is describing people who are under the judgment of God, and yet have a zeal for God. The problem with their zeal for God was that it was based on bad theology. Israel neglected the truth of God and were slothful and indolent with respect to their study of the things of God.
This is why orthodox Christianity declares belief in the resurrection of Christ to be essential. If a person denies the resurrection of Jesus Christ from the dead, then he cannot possibly be a Christian. Christians can make mistakes in theology and not everybody is perfectly orthodox. Indeed, if we had to wait until we were perfectly orthodox before we were saved, none of us would be saved. But the denial of the resurrection of Christ is an intolerable error. You cannot be saved if you do not believe in the resurrection of Christ.
Since they did not know the righteousness that comes from God and sought to establish their own, they did not submit to God’s righteousness (verse 3). God did not accept the Israelites because they put their faith in their own law-keeping, and not in the Saviour. But Christ is the end of the law so that there may be righteousness for everyone who believes (verse 4). The law which itself reveals the pattern of good works should drive us to Christ. Christ is the point of the law; Christ is the goal of the law; Christ is the meaning of the law. So if you try to follow and obey the law, but avoid Christ, you have missed the whole point of the law
End probably includes the idea of both goal and termination. The Mosaic law has reached its goal in Christ (it looked forward to and anticipated him), and the law is no longer binding upon Christians (the old covenant has ended). Since Christ is the goal and end of the law, righteousness belongs to all who trust in Christ.
This is difficult to understand. I am not sure exactly what Paul means here, but there was a tradition among the Pharisees that if any single Pharisee kept all the Jewish laws perfectly for one day, that man’s righteousness would be so pure that it would induce God to send the Messiah. The idea was that if a person was good enough he could have the merit to climb right up to heaven and bring the Messiah down, or if the Messiah had gone into hell, he could bring him back up. But who has that kind of righteousness, that kind of merit? We can’t climb up into heaven and bring the Saviour down from heaven. The whole point is that only God can send a Saviour from heaven, and only God can bring one back from the dead. Only God can save you and that is where your faith must be.
30:12–14 in your mouth and in your heart. This is the result of the circumcised heart that enables obedience (see note on v. 6). Paul quotes from these verses in Rom. 10:6–8 to show that the Jews already had the message of faith through the Scriptures.