What does the Bible say about the message of the book?

The central message of the Bible, as seen in John 1:45, is Jesus Christ. Philip's declaration to Nathanael that they have found the one whom Moses wrote about signifies that the entirety of the Scriptures points to Christ as the Savior of God's people. The Old Testament law and prophets, including the writings of Moses and the Psalms, bear witness to the coming of Christ and the salvation He provides. Jesus told the Pharisees that those Scriptures testify of Him, showing that Christ is the fulfillment of God's plan for redemption through the centuries.