No. Paul never says that it is impossible to keep the Law anywhere in this text.[/quoe]
Paul says that it is impossible to keep the law many times throughout Scripture, and if it is not Paul it is written elsewhere by the Holy Spirit, the author of all Scripture.
Paul says a number of things such as:
1. The scriptures say that everyone who does not keep the law is cursed. Let's be clear: This is not a statement that it is impossible to keep the law, it is a statement about what is true about those who don't keep the law.
When is the last time that you have lied, transgressed any law at any time, thought an evil thought, or sinned through a sin of omission--not read your Bible, not prayed, not witnessed (Mat.28:19,20). This also is sin. Sin is a transgression of the law (1John 3:4). It is missing the mark (Romans 3:23), which means missing the mark of God's holiness or glory. Are you as holy as God is holy? You have missed the mark. You have sinned. You are not perfect. You have fallen short. That is the purpose of the law--to show how exceeding sinful we really are. No man can keep the law.
2. Even those who keep the law - like Paul did - are not justified by doing so.
Paul didn't keep the law, and never said he did.
Where does Paul say that it is impossible to keep the Law of Moses?
Many times Paul, Jesus, James, say that it is impossible to keep the law. Where do any of these say it is possible to keep the law?
Here in Phillipians 3, Paul asserts that, in fact, he did keep the Law of Moses:
as to the righteousness which is in the Law, found blameless
You are wrong here. Paul does not assert that he kept the law. Look again.
Philippians 3:6 Concerning zeal, persecuting the church;
touching the righteousness which is in the law, blameless.
--He kept the "righteousness" which was in the law, not the law itself.
He was a "righteous" person as far as he was concerned.
Remember what Jesus said about this.
"Unless your righteous exceed the righteousness of the Pharisees you can in no wise be saved."
Paul did not say he kept the law.