Matthew 17:1-13 records the Transfiguration of Jesus in front of Peter, James and John (cp. Mark 9:1-13). During that transfiguration Moses and Elijah appear on the mountain with Jesus (17:3). What is the biblical-theological significance of their appearance? And why Moses and Elijah? How does their appearance contribute to our understanding of who Jesus is?

HINT: There is a LOT that could be discussed here; feel free to explore any and all of those possibilities.