The Creator can be seen in His creation, and nature only offers a glimpse but the Bible offers the fuller picture. The Bible was written to reveal who God is, allowing us to enjoy God and His word.
The 27-book canon of the New Testament was written over roughly 50 years, proclaiming the life and gospel of Jesus Christ. The 4 gospels in particular had 4 different audiences. They are not typical biographies, as one third of them focuses on His death, the most important event in history. The New Testament serves as the fulfillment of Old Testament prophecies of God’s covenant with His people, and ends with the establishment of a new Kingdom on Earth.