How do we know that Jesus is the Messiah according to Mark 9?

In Mark 9, the Transfiguration serves as a pivotal confirmation of Jesus’ messianic identity. The presence of Moses and Elijah, who represent the Law and the Prophets, highlights that Jesus is the fulfillment of biblical prophecy. The voice of God from the cloud reinforces this truth by proclaiming Jesus as the beloved Son and instructing the disciples to listen to Him. This moment reveals the divine nature of Christ and His unique authority over the salvation narrative that spans the Old and New Testaments. Furthermore, the disciples' witness of His glory prepares them for the trials ahead, emphasizing their need to recognize Jesus as the Savior who must suffer and die for humanity's redemption.