What economy was the Old Testament under?
The Old Testament was under predominantly the economy of law, given to the nation of Israel, who were under the law with their temple worship, priesthood, and sacrifices. That law economy had to slip off the scene when God turned to the Gentile, ushering in something totally different.
Les explains that the Old Testament was under predominantly the economy of law to the nation of Israel, who were under the law with all their temple worship, their priesthood, and their sacrifices. He emphasizes Pauline teaching and says 90% of study time and Bible reading should be in Paul's epistles, but he never indicates forgetting the rest of Scripture. The Old Testament is just as well fitted as the New, and it all dovetails together. But now that God has turned to the Gentile, that law economy had to slip off the scene, and we have something totally different. Les asks people not to take his word but to search the Scriptures and see that the same kind of language found in Romans and other Pauline epistles is not found in the Gospels or Old Testament, because this is part of the revelation Paul speaks of, the mystery held in the mind of God and now revealed.