[quote="4most4christ, post:1, topic:338901"]
What is the teaching on the pre-flood Genesis 6:1-2 and the understandng of the "sons of God" interpretation?
Some interpretations are :
1) Following the decscription of the descendants of Cain (Gen. 4) and Seth (Gen. 5) those mentioned in vv.1-2 are from the Sethite line.
2) They're angels in human form who procreate with humans, creating large progeny & incurring God's wrath.
3) They're merely giants, the "Nephilim", from a line of peeps who ate their wheaties.
4) It's a mythological story.
For Saint Augustine, the "sons of God" of Gen 6:1 means the "city of God" or assembly of the faithful. Its equivalent for Christians would be "the baptized".
"Sons of God" can refer to angels but in this case clearly not. Remember that "angel" is a teleological word - a thing that is called by what it does or the purpose it serves: I.e., what it is for (e.g., a (cigarrete) lighter): "angel" means "messenger" and usually understood specifically as a messenger of God. Ergo both men and immaterial spiritual beings can be angels; indeed, even non-living things could and sometimes were (in the history of salvation) used as angels, as, e.g., Saint Paul would use the rock that followed the Israelites in their wandering of the desert as being a messenger of God or sign of Christ's presence. The duty of the sons of God is to be angels of God in the sense of representing Him; the sons of God of Gen 6.1 apostatized and became fallen exactly when they ceased or failed to fulfill this duty.
"Nephilim" can be understood not only of physical stature, which was probably literally true (though we have no way of knowing to what extent or how relative the term was, but certainly it would do injustice to the word to pretend it didn't mean something very striking or significant) but it also can refer to or include renown (while not denying its more literal sense concerning physical stature). The Nephilim of Genesis may be an attempt by the author to explain the origins of the universal pagan myths referring to men (often the same men under different names) of great stature and who accomplished remarkable deeds.
Indeed, the Church's belief in the rebellion of the angels seems in part to be based on this theme of apostasy in Scripture combined with the allusions that there was such a rebellion at the beginning of Creation that did not include men initially but only later (i.e. when Eve was seduced by the serpent and Adam then with her). Our Lord certainly affirmed this belief in the rebelliong of the angels at least in part in the written records of the Gospel when He spoke of Lucifer's or the devil's fall specifically.
It is not a mythological story in a certain sense: the theme of the faithful apostatizing is continual and recurrent throughout the whole Bible from beginning to end, including the New Testament. It is scarcely mythology when we read the histories of the people of God/Israel (i.e., the sons and, in a certain sense, angels of God) apostatizing: this was obviously meant to be taken as literally true history in the Old Testament's history of Israel, without denying the other "layers" (as dear Brother JR would say) that scripture always contains.
Hope this helps!