John Chrysostom
Paul refers to the ancient words of Hosea when he states, ‘I will not call My people My people, and I will not call the beloved My beloved.’ This serves to show that, should anyone claim they are being misled, the apostle calls on Hosea as a testament to the truth, for he proclaimed, ‘I will call not My people My people.’ These ‘not My people’ clearly denote the Gentiles, and the same can be said for those termed ‘not the beloved.’ Yet it is declared that they shall indeed become a people, cherished and recognized as sons of God; they shall be called the sons of the living God. The apostle continues his argument by showing that, even if one interprets this as referring to those among the Jews who came to faith, our understanding remains valid.
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If those who were once favored, yet turned ungrateful and distancing themselves, could lose their standing as a people, then what would inhibit those who were estranged from the outset from being called and receiving the same blessings upon their obedience? The apostle does not stop with Hosea; he further cites Isaiah, who echoes Hosea's message.