It is good that you are placing your trust in the Bible as your first source since who wouldn't want to trust what God says first above anything else. However, if you really trust the Bible, then go with what the Bible says about it being written in parable form. The Bible is God's law book, the law of God. Psalm 78:1-2 says that the law is a parable: "...Give ear, O my people, to my law: incline your ears to the words of my mouth.I will open my mouth in a parable..." Also, Mark 4:34 says: "But without a parable spake he not unto them: and when they were alone, he expounded all things to his disciples." The word of God is given to us in parable form and Genesis is the same. When Jesus explained how to interpret parables in Mark 4, he showed us that surface stories are not really the real meaning, but surface stories have interpreted meanings quite distinct from the surface text. For example, 'thorns' in the Bible are not really thorns from someone's backyard. 'Thorns' is a parable word meaning "such as hear the word,And the cares of this world, and the deceitfulness of riches, and the lusts of other things entering in, choke the word, and it becometh unfruitful". Good ground is not likewise soil from a backyard garden. Rather 'good ground' is a parable word meaning " such as hear the word, and receive it, and bring forth fruit, some thirtyfold, some sixty, and some an hundred." It is the same thing with Genesis. You cannot read the surface text and have the real interpreted meaning. I could say Genesis says that God made the world in six days but what is the interpreted parable meaning of the surface text? That would be the real meaning. If you rely on surface interpretation of the Bible for your information, then be prepared to chop off your hand if it offends you, and pick up physical serpents, and drink physical poison, and have a physical mark emblazed in your forehead, and to see Christ with a metal sword sticking out of his mouth and so forth. Parables must be interpreted to get at the true meaning. God is constantly interpreting Genesis surface words in other places in the Bible, and in Genesis itself. Light, of course is Christ. Darkness is the absence of Christ. For example, the Bible says heaven is God's throne, not the upper stratosphere, and Jesus is found on the throne, and the throne seems to be in people's hearts, since the Daystar is Jesus is said to arise in people's hearts. John 9:4-5 says that as long as Jesus is in the world it is called Day and light. How long is Jesus in the world? Just 24 hours? Not likely. Is he still in the world as long as he has believers in the world. I think so. What is the darkness that is upon the face of the deep in Genesis 1? 'Deep' is a parable word meaning 'judgment'. Psalm 36:6 says: " ...thy judgments are a great deep..." Is God's judgment the physical ocean or something else? God's judgment is not really the physical ocean, so when the spirit of God moved on the face of the deep, I think it is not talking about the ocean. Genesis says God called the dry land earth. Is earth really planet earth if it is just the dry land? And isn't the dry land a parable phrase for people in need of the water of the gospel?