Don’t look so surprised. Genesis is not some lofty preamble to the Bible, but rather it is its spine, giving support and reinforcement for many of the later events which are recorded in other books of the Bible.
In Luke 1, starting in verse 26, we read of the angel Gabriel’s visit to Mary and announcement of God’s plan for her life, a plan that would be the salvation of all. In the exchange between Mary and Gabriel regarding this baby that she was to bear, we see a glimpse of Genesis 1.
Then Mary said to the angel, “How can this be, since I do not know a man?” And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Highest will overshadow you.” Luke 1:34-35
In Genesis 1:2, we read “The earth was without form, and void; and darkness was on the face of the deep. And the Spirit of God was hovering over the face of the waters.” Just before He created the world, God hovered. Then in a moment, God spoke and the world was created. It was His glory shown forth.
The heavens declare the glory of God; And the firmament shows His handiwork. Psalm 19:1
And so it was with Mary. The Holy Spirit came upon her, the power of the Highest overshadowed her and the glory of God was once more shown forth. God became man. The Christ was born of a virgin, in Bethlehem, and a Great Light came to those in darkness. Promises kept.
And without controversy great is the mystery of godliness: God was manifested in the flesh, Justified in the Spirit, Seen by angels, Preached among the Gentiles, Believed on in the world, Received up in glory. 1 Timothy 3:16
Jesus is the glory of God shown forth. It was the glory of God to not spare His own son, but deliver Him up for us all that we might have the chance to know God, to fellowship with God, to live in the glory of God forever.