Through whom did God turn to the Gentiles in the gospel of grace?

Les explains that from the beginning God knew the day would come when He would go to the whole Gentile world with His salvation. The Old Testament had foretold it: Isaiah 49:6 says God would give His servant as a light to the Gentiles, and His salvation would reach to the end of the earth. God's original idea was to reach the Gentile world through the covenant people of Israel, but when Israel was constantly rejecting it in unbelief, He had to send the nation into dispersion, took away their temple and their land, and turned to the Gentiles through the apostle Paul in this tremendous gospel of the grace of God. Les also points to Hosea, where God said He would call them His people who were not His people, and they would be called the children of the living God — that is, Gentiles who now, in this age of grace, can say "You're my God."