Hi Polymatheia, first off, I see you are pretty new here, so WELCOME TO CF ..
Thanks, hello to you too.
Assuming that you believe the universe is old, and that macro evolution is true, what do you believe the Adam/Eve narrative is capable of revealing to us about "the origin and character of sin"?
IMO, the narrative at the beginning of Genesis shows a sin as a falling away from God. A separation from him. It also lays out a number of other important theological concepts which underpin all of Judaism and Christianity.
1. That God created the world and that His creation in inherently good. This counters the Platonic view of many early Christians that God created the world, but from material which was eternal and had always existed. They attempted to explain the presence of evil in the world through the imperfect nature of material, which even God could not correct. Genesis lays out clearly though that God's creation is good, and that sin is the result of human rebellion from God, not inherit flaws in material.
2. It lays out that man holds a special place with God. That he was created in the image of God and posses a will and character which is in ways like his. This is important because it affirms that man is not just animal, but has a higher, spiritual purpose. Just because man is the result of billions of years of evolution does not take away this spiritual element, indeed, that we find it in ourselves proves that this is not the case. Most notably,
the fact that man was created in the image of God shows that our senses are like his in kind, and that our intellect is like his in kind, I think this is the best argument against YEC, and I'll expand on that in a moment.
3. It shows that sin is a fall away from God, a spiritual rebellion which keeps us from Him. Sin is not sin because it violates some sort of ephemeral, immortal code, it is sin because it violates God's will.
Also, as long as we are trying to reason why God would do this or that, why do you think God would present us with such a wild fable about our origins and the origin of the universe, when simply telling us the truth (especially if in its most simplistic form) would have been so much easier? Also, why do you believe that Jesus, when He was here among us, would perpetuate what amounts to little more than a lie in His many references to the first 11 Chapters of Genesis? It would have been so easy for Him to clear things up, like who the 'real' author(s) of the Torah was/were or, at least, that is was not Moses.
Let me ask the corollary of that: why would God create a universe that runs on logic, obeys the laws of mathematics, and one which unfolds its secrets to us under the lens of the scientific method, but then have this whole universe, in all its beauty and grander, really be a giant hoax foisted upon humanity? The evidence of the age of the universe, and the planet itself, sit on observations about the basic building blocks of the universe. Atomic radioactivity is used measure the age of the Earth, the speed of light vis-a-vis background microwave radiation in space is used to measure to age of the universe. These are not complex processes like evolution, they are the basic units that we've found in the universe, and the way they behave leads us to the conclusions of "science,"
did God create these as a hoax?
You're either forced to conclude that God meant the Bible to be allegory, or that our senses and reason are profoundly flawed. However, according to Genesis we are created in the likeness of God, so I don't see how you could assert that our senses are fundamentally flawed.
Why wouldn't God just explain it all? I don't know, perhaps he wanted us to figure it out on our own. What I think is that the spiritual message contained in the Bible is in a form we can actually digest easily and take guidance from. I've read Brian Greene's the Elegant Universe and Stephen Hawking's A Brief History of Time, and I don't think they are the most easily digestible texts in the world. The fact is humanity is far far from understanding the basic physics which underpin the universe, and it takes a life time of study to even understand a lot of the theories that are in vogue now (and many forms of string or super gravity theory will be out in 10 years!). Clearly explaining it all is not all that simple. That's not even getting into complex systems like the brain or eco-systems.
As to the idea that the authors of given books of the Bible are not the authors who are put forth in said books, I don't see how this affects the nature of the scripture itself. Inspired works are inspired works, and it may have served God's purpose for letter, perhaps not inked by the physical hands of Moses or Paul, to still take on their name. That's a question of study which is difficult, but I don't think you just ignore, or reject outright all the historical analysis of those works just because it challenges your old views. You take that information and see what it means to you. I don't think it
has to change how you read scripture, but it might actually add to your ability to find meaning in it.
--David
p.s. - which "large parts" of the Bible do you believe are meant to be taken allegorically?
The idea that the creation story is meant to be allegory is not a new one. One of the claims YEC tries to make is that this take on Genesis is a new one, foisted on faith by the science of the Enlightenment, but the allegorical reading of the Tanakh pre-dates Christianity. Not that an appeal to antiquity is measure of truth, but even the earliest recorded Christian theologians like Origen and St. Augustine put forth the idea that the creation story is allegory.