Why was Noah picked of all people?
>"Noah was a righteous man, and perfect in his generations: Noah walked with God."
"perfect in his generations"
Take a breath and think: What does "perfect in his generations" mean?--and right after an introduction that talks about the sons of God taking wives of the daughters of Adam.
This is not to say Noah was the only uncorrupted descendant of Adam. Of any that were "perfect in [their] generations," only Noah would be in the line of first born (following the order of first born son outliving their father's passing, Noah being the eighth from Adam), which is how he's "the eighth preacher of righteousness" as 2 Peter declares. (It is worth looking at how wildly our different versions "translate" that verse. They add whole terms, trying to piece together how Noah is "eighth." Some decide he was just "eighth on the boat." 🙄)
The flood did not kill everyone and was not meant to. It was meant for the descendants of Adam--to start over with Noah, perfect in his generations, eighth in the line of first born, the eighth preacher of righteousness--because God lamented that those of Adam were becoming corrupted *racially* (which results in irreversible corruption, as we see even today). That is the blasphemy of the Holy Spirit--the blasphemy of that which God had given only to Adam. One may blaspheme the Son of Man and be forgiven, but the blasphemy of the Holy Spirit will not be forgiven, as it cannot be undone. The children will not be of the promise. A bad tree cannot produce good fruit, a good tree cannot produce bad fruit, and no where is it said a bad tree becomes a good tree.
It matters because of *how* Christ's salvation works.
It is Christ who is now the preacher of righteousness, the mediator, after that same consideration of first born priests/mediators (or as Paul states it in Hebrews, "after the order of Melchizedek," a transliteration of the Hebrew for "righteous king"). It is Christ, being God, that is the true vine, by the Spirit, rather than Adam. Even Adam is--by the Spirit given to him by God (who is Christ)--a son. And so, being the descendants then of our Father, we are the branches--and only through Christ, who is called the way and the life *because of this.*
We are not found as cursed descendants of a forefather (Adam), who would be our mediator, a cursed and sinful one, who died and would be replaced by the firstborn surviving him. Nor are we found with any of that line of firstborn as our mediator, who would also be found corrupt and also pass to death. Instead the forefather of even Adam (as He gave to Adam His Spirit) has come as a son of man. God Himself is our Father, by this, the true vine. And the justification of the restoration/resurrection (however you want to translate it) will be by this consideration. He is the vine; those descended from Him are the branches.
"Every plant which my heavenly Father planted not, shall be rooted up."
