Verse 7
Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.
Neither because they are lineally the seed of Abraham, will it follow that they are all children of God - This did not hold even in Abraham's own family; and much less in his remote descendants. But God then said, In Isaac shall thy seed be called - That is, Isaac, not Ishmael, shall be called thy seed; that seed to which the promise is made.
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