What does the Bible say about God's revelation in the New Testament?

In Hebrews 1, we see a crucial distinction between God's revelation in the Old Testament and the New Testament. Previously, God spoke through prophets, delivering messages to His people; however, in these last days, God has revealed Himself through His Son, Jesus Christ. This shift signifies a transition to the full revelation of God's message and purpose in Christ, who is described as the radiance of God's glory and the exact imprint of His nature. Thus, believers are assured that God's ultimate communication is found in Christ, making Him the focal point for understanding God's will and salvation.