Depends on the explanation. If it says that all sand was only created last Tuesday out of leftover Big Mac wrappers and that God put left footprints in it to show that he only created our left leg, but the right leg was created by the devil, I would have to say no, it does not illuminate anything. If it read, “I am a veteran who lost his right leg in the gulf war; I’m resting under that tree with the lightning-forked trunk right ahead of you since my leg hurts from hopping all this way. If you would go back to my camp and bring my crutches which I left there, I will reward you,” that would make more sense. But Genesis to me reads more like the first message than the second.
“Revelation” has meant all sorts of things to all sorts of people depending on the point they want to make. First we have to determine whether God made a revelation at all (presuming there is a God who wants to); second, if he did, whether the Bible is it. Third, we have to know why it says what it says about God, and in what literary forms, and how to establish what the writers mean by what they say, to know whether or not to trust it to reveal God accurately. In order to establish all this, we have to compare scripture with the world as we know it to see how compatible they are, since the Bible claims that the God whose actions and motives it describes created the universe. Does the world we live in seem the sort of world that the God the Bible describes would have made? And is the Bible’s portrayal of that God internally consistent? That is, do his actions match his attributes? Since the Bible is the book we are investigating, we cannot rely on its authority, or on the authority of any organization claiming to validate or to be based on its authority, to answer these questions without circular reasoning.
After 20 years of reading apologetic and controversial books on both sides of the question, my considered opinion at this point is that the Bible is a book written by human beings without any more divine guidance, inspiration, or authoritative revelation than God gives to any other author or any other book. Therefore, I judge its claims on their merits. Scientifically, it is worthless. Poetically, parts of it are sublime (I especially like Psalms and Isaiah). Morally, it is a mixed bag, with the New Testament better than the Old, but neither anywhere close to perfect.