For they are not all Israel, which are of Israel... For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth; It was said unto her, The elder shall serve the younger. As it is written, Jacob have I loved, but Esau have I hated... Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth. Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will? Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay...?
This is the Bible's hardest passage on predestination—and Paul knows it. He anticipates the objection: 'Why does God still find fault? Who can resist his will?' His answer is not philosophical defense but divine prerogative: the potter has rights over the clay.
The context matters: Paul is agonizing over Israel's rejection of Christ. How can God's promises fail? His answer: they haven't. True Israel was never simply biological descent. God always chose within Israel—Isaac not Ishmael, Jacob not Esau—before they had done anything good or bad.
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