[1000 silverlings]

Isaac fathered Jacob and Esau. Esau is not a child of the promise. Likewise not all descendents of Israel are Israel, or in other words, the flesh prevaileth nothing, it is the Spirit that saves.

[Uncle Chip]

Isaac fathered Jacob and Esau. Esau is not a child of the promise.

But like Isaac, Jacob was also the child of promise [that the elder shall serve the younger]. Ishmael and Esau were children of the flesh, but Isaac and Jacob [Israel] were children of the seed of Abraham as well as children of God's promise.

or in other words, the flesh prevaileth nothing, it is the Spirit that saves.

And that Spirit says:

"Hath God cast away his people? God forbid. For I [Paul] also am an Israelite, of the seed of Abraham, the tribe of Benjamin" [Romans 11:1]