"Salvation is of the Jews, because the flesh of Israel is the abode of the divine presence in the world. It is the carnal anchor that God has sunk into the soil of Creation." - Michael Wyschograd, "The Body of Faith"
"Now the Lord said to Abram, "Go from your country and from your relatives and from your father's house, to the land which I will show you; and I will make you into a great nation, and I will bless you, and make your name great; and you shall be a blessing; and I will bless those who bless you, and the one who curses you, I will curse. And in you all the families of the earth will be blessed."" (Genesis 12:1-3)
God's promises here, are really a detailing of what I highlighted as one of the main elements of the Gospel in the last post - namely, that God's desire is to restore Creation to the way that He made it in The Beginning. Genesis 12 is where the details start to emerge about how God will do it. It starts with one man, Abraham, who is promised descendants as numerous as the 'sand on the seashore'/'stars in the sky' (Gen 15:5, Gen 22:17, Gen 26:4, Gen 32:12, etc). The one man grows into the Nation of Israel, who God identifies himself with and through, continually calling himself the God of Israel and being called the God of Abraham, Isaac and Jacob. Understanding the election and chosenness of Israel is really the hermeneutical key to understanding all of Scripture.