What are the doctrines of grace given to Paul embedded in?
The doctrines of grace given to Paul are embedded in what Paul consistently calls the Mysteries. God gave these truths to Paul, not to take to Israel, but to carry far hence to the Gentiles and also the Jews. They remain part of God's inspired Word.
Les explains that just as God gave Moses the Law at Sinai and Moses took it to Israel, now 1500 years later God is dealing with a different individual. He gives Paul these doctrines of grace, which are embedded in what Paul always refers to as the Mysteries. Paul is not instructed to take them down to the nation of Israel, but instead to take them far hence to the Gentiles and of course the Jews. Les stresses that all of God's Word is inspired, yet God made it plain that Paul is the Apostle of the Gentiles, pointing to Romans 11:13.