So much could be said about the opening line of Genesis. It sets the stage for the rest of the Bible. It forces Christians everywhere to marvel at the work of God's hands. It reminds us of Who is in charge of the universe. It presents the lens through which believers view the world.
The opening statement of the Bible sets the stage for the rest of the Bible. The Bible makes it clear that God created the universe. "Universe" literally means a "single spoken sentence". If God created the heavens and the earth, then everything that has happened in the universe could not have happened without His creating the universe. Nothing in space could have existed without God. The planets could not have formed without God. Life could not have existed on earth without God. There would be no history of mankind. We simply would not exist without God. We are ultimately a result of a Supreme Creator.
As Christians, we cannot help but marvel at the work of our Creator's hands. Take a look at the moon and stars at night. Look at the seemingly endless expanse of outer space. Then read Genesis 1. Read about the incredible design of the universe. Then reread Genesis 1. Our Creator took a lot of care in His creation, didn't He?
Genesis 1:1 also reminds us that are not in charge of the universe. It would be really scary if I were in charge of the universe. God has much more patience than I do. His mercy and grace are greater than what I could give. Thank the Lord I am not in charge! This verse makes it clear that, as the Creator, God is in charge of His creation. He is the only one that I trust to be in charge of the universe!
Finally, this verse gives us the lens through which we should view everything in the universe. This verse forms part of our worldview. Genesis 1 makes it clear that we have a theistic Creator--a Creator who not only created the universe, but still cares for His universe. We do not serve a deistic Creator--a Creator who is uncaring. Rather, our Creator cares for us. He ultimately showed this by sending His Son, Jesus, to save us from our sins.