In Genesis 4:1-2 it says “And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the Lord. And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground.” From the previous comment on the male passing on the sinful nature we look at the symbolism in these two versus based upon the outcome off life after birth. In verse 1 Adam says I have gotten a man from the Lord – Cain (sin or evil). In verse 2 Eve says I have a keeper of sheep – Abel (good). What we find in looking further in history was Cain was a hell raiser and kills his brother Abel and now Eve has no seed from which God’s redeemer would come from. God had to give Adam and Eve another seedling (child) that we know is Seth who through his linage Jesus came. So Seth created the bloodline of Jesus.
But let’s look a little deeper here because we will find history repeats itself. Just as God (good) had separated Himself from Satan (evil) in the spiritual realm we find that now we have the same in the physical realm. Cain taking up with Satan and his bloodline through history identifies with evil and had Able lived it would have been Able’s bloodline of Jesus. Since Cain killed Able, God gave Eve another seed, the bloodline of Jesus came from Seth.
If you recall the story of Cain, He was exiled and God made a promise to Cain not to allow him to be killed. Cain’s linage was the Cainites. Again, we should ask the question of why. Many scholars have very different views of why Cain was not killed. But when we look at history backwards (future proves past) we get a completely different reason for the leniency.
God exiled Cain to Nod east of Eden. Where was Nod located?
The Bible mentions the land of Nod just one time. After Cain murdered Abel (Genesis 4:8) he went away and settled in a place called Nod, east of Eden (Genesis 4:16). Besides that, no one knows where Nod is located.
Nod, in Hebrew, means "wanderer, exile, or fugitive." After Cain killed his brother, God declared, among other things, that Cain would be "a fugitive and a wanderer on the earth" (Genesis 4:12). Based on this, some scholars believe Nod was not a specific location, but anywhere Cain wandered.
Nod is described as being east of Eden, meaning Cain was further removed from Eden than were Adam and Eve. Genesis 4:16 tells us that "Cain went away from the presence of the Lord." Though God sent Cain from his home, it was Cain's choice to live apart from God's presence. Unfortunately, Cain became a godless person and the society that sprang from him and his descendants was godless (Genesis 4:16–24).