What does the Bible say about God's communication with His people?

According to Hebrews 1:1-3, God who spoke at different times and in various ways to the prophets in the past, has in these last days spoken to us by His Son. This signifies the culmination of divine revelation in Jesus Christ, who not only proclaims God's truth but embodies it. The prophets were spokespersons of God, conveying His messages, while Christ is the complete and final revelation of God Himself. John 1:18 affirms this by stating that the only begotten Son, who is in the bosom of the Father, has declared Him.