Are the writers of Genesis trying to compare Cain's (Genesis 4:6) and Adam's lineages (Genesis 5) to show the difference between a community that follows God and a community that moves away from God?
Is there a significance behind Enoch's appearance in Cain's lineage and Enoch in Adam's? What about Lamech in Cain's vs. Lamech in Adam's? They obviously aren't the same men, yet each has a specific role in the lineage that seems to have a third layer of meaning, especially when compared to its counterpart in the other (they almost seem to mirror each other). Am I just making this up or looking too deeply, or was this a literary tool the ancients would have used to communicate a deeper point, and if so, what?