The point I was eluding to is you can not say that the seed of Abraham included all of his descendants as being blessed or recipients "promise". As we follow the trail of the Seed to Jesus you can clearly see its not by blood its by election.
Even the definition of posterity gives room to the notion of Satan perhaps siring Cain. How you understand this concept effects how you will interpret the rest of scripture. My personal take on it is there are 2 parts to Israel one of the flesh "all of the blood descendants" and "Israel of the Promise", or better stated one of the promise and one of the flesh. This is clear in Paul's teaching [
Neither, because they are the seed of Abraham, are they all children]---- [but the children of the promise are counted for the seed] Though God did extend the promise to all Israel during the OT may, just as today never knew the Lord. if you don't make this distinction in the old testament you will come away thinking there is one "unconditional" relationship from God to Israel and one for everyone else. Just as in Gen 3 the seed has 2 meanings first and foremost it is speaking of Jesus. Secondly it is referring to posterity, the decedents of Eve. But the bible clearly indicates that the path of the Seed is like the wind no man knows where it comes from or where its is going. And thirdly it clearly does not indicate all the decedents by virtue of posterity. The promise was not that all Israel would be saved, the Promise is Jesus the seed of Eve.
pos·ter·i·ty
/pɒˈstɛr
ɪ
ti/
Show Spelled[po-ster-i-tee]
Show IPA –noun 1. succeeding or future generations collectively: Judgment of this age must be left to posterity. 2.all descendants of one person: His fortune was gradually dissipated by his posterity.
I can't stop without commenting about the Holy Spirit. In the OT I see the HS resting on a few. Abraham Isaac, Jacob, Joseph, ect.
The finial atonement for sin had not yet come and the poring out of the Holy Spirit Acts 1:4 ..........
but wait for the promise of the Father, which, saith he, ye have heard of me.
All the time the priest were offering sacrifices for sin for themselves and the people. A reflection of God covered Adam and Eve with a coat of skin the first sacrifice. I doubt God used road kill to cloth them, something had to die.
For God to be proactive in His fallen childrens life's this provision "temporary" atonement for sin was made. You can still see the modern rendition of this concept in the Catholic church today. If you attend mass and the go off a couple days later and sin, you must return to mass to be absolved of this new sin. This can only be done by a Catholic priest "Levi" same concept. This is why the path of the promise of the seed is not flesh and blood, its God working threw the HS pointing and demonstrating His plan for salvation. We do see people in the OT that God was pleased with along the way, and others who were also Israel He was not so pleased with. God is a reader of mens minds and the motives of his heart. No man can come unto me, except the Father which sent me draws him......... Im done I'm beginning to ramble :)
Now if you apply all of that to Satan's seed Gen 3 you come away realizing its not simply flesh and blood.