What was the purpose of the Transfiguration? Matthew seems to tell us in that 'before them.' It was for their sakes, not for His, as indeed follows from the belief that it was the irradiation from within of the indwelling light. The new epoch of His life, in which they were to have a share of trial and cross-bearing, needed some great encouragement poured into their tremulous hearts; and so, for once, He deigned to let them look on His face shining as the sun, for a remembrance when they saw it covered with 'shame and spitting' and His brow bleeding from the thorns. But perhaps we may venture a step farther, and see here some prophecy of that body of His glory in which He now reigns. Speculations as to the difference between the earthly body of our Lord and ours are fascinating but unsubstantial. It was a true human body, susceptible of hunger, pain, weariness; but we are not taught that it carried in it the necessity of death. It may have been more pliable to the spirit's behests, and more transparent to its light, than ours. There may have been in that hour of radiance some approximation to the perfect harmony between the perfect spirit and the body, which is its fit organ, which we know is His now, and to which we also know that He will conform the body of our humiliation. Then His face 'shone as the sun'; when one of these three saw Him in His glory, 'His countenance was as the sun shineth in his strength'; and His own promise to us is that we too 'shall shine forth as the sun.' Then His garments were white as the light; His promise is that they who are worthy shall 'walk with Him in white.' The Transfiguration was a revelation and a prophecy.
II. The appearance of Moses and Elijah.
While the three are gazing with dazzled eyes, suddenly, as if shaped out of air, there stand by Jesus two mighty forms, evidently men, and yet, according to Luke, encompassed in the white radiance, walking with the Son of Man in a better furnace. What a stound of awe and wonder must have touched the gazers as the conviction who these were filled their minds, and they recognised, we know not how, the mighty lineaments of the lawgiver and the prophet! Did the three mortals understand the meaning of the words of the heavenly three? We cannot tell. Nor does Matthew tell us what was the theme of that wondrous colloquy. These two might have asked, 'Why hast Thou disquieted us to bring us up?' What is the answer? Wherefore were they there? To tell Jesus that He was to die? No, for that lay plain before Him. To learn from Him the mystery of His passion, that they might be His heralds, the one in Paradise, the other in the pale kingdoms of Hades? Perhaps, but, more probably, they came to minister to Him strength for His conflict, even as women did of their substance, and an angel did in Gethsemane. Perhaps the strength came to Jesus from seeing how they yearned for the fulfilment of the typified redemption; perhaps it came from His being able to speak to them as He could not to any on earth. At all events, surely Moses and Elijah were not brought there for their own sakes alone, nor for the sake of the witnesses, but also for His sake who was prepared by that converse for His cross.
Further, their appearance set forth Christ's death, which was their theme, as the climax of revelation. The Law with its requirement and its sacrifices, and Prophecy with its forward-looking gaze, stand there, in their representatives, and bear witness that their converging lines meet in Jesus. The finger that wrote the law, and the finger that smote and parted Jordan, are each lifted to point to Him. The stern voices that spoke the commandments and that hurled threatenings at the unworthy occupants of David's throne, both proclaim, 'Behold the Lamb of God, the perfect Fulfiller of law, the true King of Israel.' Their presence and their speech were the acknowledgment that this was He whom they had seen from afar; their disappearance proclaims that their work is done when they have pointed to Him.