Luke 9:18 - 36

Jesus begins to instruct His followers more explicitly on His identity as the promised Messiah.  He begins by asking about the popular conceptions of Him, only to drive home the reality that He is more than anyone expects.  Because of this, there is a great price to be paid as His follower - it will cost everything, but is worth any cost.  Three of His followers are then privileged to see Him in His true glory, an event that changed all three for the rest of their lives.  Read the writings of John, Peter and James - notice how each one writes about the certainty of Jesus' identity, the gloriousness of His presence, the reality of His deity.  This event was critical in their lives.