When was the truth about Gentile salvation by faith alone first revealed?
It was first revealed after Israel rejected Him and was dispersed, when God unveiled the mystery kept secret since the age began. It is now revealed through the preaching of Jesus Christ—the Gospel of the grace of God—that Gentiles are saved by faith, and faith alone, apart from Israel.
Les explains that this was a total secret kept in the mind of God: God would go with salvation to the Gentiles without Israel, even though Israel rejected Him and He displaced them from Jerusalem, dispersing them into the nations of the world. Les points to Romans 16:25, where the mystery or secret was kept secret since the age began. He teaches that ever since the creation of man, it had never been revealed that God would take salvation to the Gentiles by faith, and faith alone. All the Old Testament was by way of Israel, but now the secret is revealed, and God has gone to the Gentiles with the Gospel of the grace of God.