The central message of this sermon is that God communicates with humanity through various means, but ultimately and completely through Jesus Christ, who is the ultimate prophet, priest, and king. This understanding advances the belief that Jesus is not just a historical figure or a spiritual guide, but the very embodiment of God's revelation to humanity. The takeaway from this message is that God has spoken to us in the past through various prophets and means, but now we have the complete and authoritative speaking of God in the person of Jesus Christ, who reveals God's words and will with unparalleled clarity and authority.