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The Fullness of the Gentiles (Romans 11:25–26) by R.C. Sproul. © Ligonier Ministries 2025. Used by permission of Ligonier Ministries. All rights reserved.
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Sproul opens by naming this the most difficult and controversial part of the most difficult chapter in Romans — and limits himself to just two verses, “and we’ll see if I am able to cover those verses in our time together.” His instinct is exactly right: Paul’s word *mystērion* here means once-hidden-now-revealed, not an unsolved puzzle — and Paul’s motive is pastoral: ‘I do not want you to be ignorant, lest you be wise in your own conceits.’ Ignorance is destructive to godliness; God gave us a massive Book so we would grow up in understanding.
The blindness in part that has happened to Israel is ‘until the fullness of the Gentiles has come in.’ The word *until* (Greek *achri*) means ‘up to a certain point in time’ — it has a terminal dimension; beyond that point something changes. Sproul’s point: the fall of Israel is neither full nor final. The hardening has a historical limit. This is not forever.
Sproul’s parallel text is Luke 21:24 — ‘Jerusalem will be trampled underfoot by the Gentiles *until* the times of the Gentiles are fulfilled.’ The same word, the same structure: a set era with a set end. In redemptive history there is a time when the focus of God’s redeeming grace is on the Jews, and a time when it is on the Gentiles — and AD 70, when the temple fell and sacrifices ceased, was the hinge between them. But according to both Luke and Paul, *that is not forever*.
Sproul calls Jesus’ prediction of the temple’s destruction ‘the clearest proof in recorded literature’ that He was a prophet sent from God — and notes the bitter irony that critics like Bertrand Russell use this same text as their favorite proof *against* Christianity, because of the timeframe references. ‘This generation will by no means pass away till all things take place’ (Luke 21:32)’ — to a Jew, a generation is about forty years. Jesus said plainly: not tomorrow, not next week — within your lifetime. And it happened, exactly as He said, in AD 70.
The Greek *plērōma* (Latin *plentitude*) means a point of saturation — the moment when God’s ‘roundup’ of the Gentile nations reaches its fullness. After that point, God’s relationship to ethnic Israel changes. Before AD 70 the church was seen as a subdivision of Judaism; after, the two were severed in the world’s eyes. But ‘and so all Israel will be saved’ stands as the promise — Sproul says a future widespread conversion among ethnic Jews is the plain reading, whatever disputes attach to the timing.
‘For the gifts and the calling of God are irrevocable.’ Concerning the gospel, Israel is ‘enemies for your sake’; concerning election, ‘beloved for the fathers’ sake.’ Both are true at once. God does not retract what He has given. The mercy chain closes the loop: you were disobedient and received mercy through their disobedience; now they disobey so that through the mercy shown to you they may obtain mercy. ‘For God has shut up all to disobedience, that he might have mercy on all.’