What shall we say then? That Gentiles, who did not pursue righteousness, have attained to righteousness, even the righteousness of faith; but Israel, pursuing the law of righteousness, has not attained to the law of righteousness. Why? Because they did not seek it by faith, but as it were, by the works of the law. For they stumbled at that stumbling stone. Romans 9:30-32
Some of you who insist that righteousness before God comes through Law-Keeping, had better rethink.
"Works of the law" You mean the first five books of the Bible. Christians don't live the five books, nor do they go to the temple to worship, it's been destroyed and no one knows who the actual priests are, since the documents were destroyed with the Temple. In other words the Jewish religion is over since they have no high priest, priests nor temple. They cannot sacrifice animals for their sin.
Any Christian who thinks that following the law leads to salvation needs to understand a couple of things...
1 You cant obey the law, the temple was destroyed 2000 years ago. Without the temple you cant even complete the law.
2 Animal sacrifice never took away Israel's sin, that's why Jesus was sacrificed he was the only one who could. So obeying the law means you don't believe in the crucifixion. Obeying the law means you still believe in animal sacrifice.
However obeying Christ is essential to salvation. The laws of Christ are not the OT laws, which is what Paul is talking about. Some Christians don't realise that by making Jesus Lord they now have to obey HIS laws and commands, not the OT. So these Christian's think that they just need to believe in order to be saved.
Luke 6:46 NIV
“Why do you call me, 'Lord, Lord,' and do not do what I say?
John 14:23-24 NIV
Jesus replied, “Anyone who loves me will obey my teaching. My Father will love them, and we will come to them and make our home with them. [24] Anyone who does not love me will not obey my teaching. These words you hear are not my own; they belong to the Father who sent me.
So if Christian's don't obey Christ it's because they don't have faith. Obedience proves that your faith is true and real. Everything else is fake.
Romans 1:5 KJV
By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name:
(How many are obedient to the gospel of Christ: Faith = doctrine)
Romans 16:26 KJV
But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith:
(Obedience comes from faith. Faith's goal is to make you obedient to Christ. No obedience, no faith)
I wonder how many Christians think they are saved but don't obey, and so, are lost?