Luke adds two very significant points to the accounts by Matthew and Mark--namely, the disciples' sleep, and the subject on which Moses and Elijah talked with Jesus. Mark lays the main stress on the fact that the two great persons of the old economy, its founder and its restorer, the legislator and the chief of the prophets, came from the dim region to which one of them had passed in a chariot of fire, and stood by the transfigured Christ, as if witnessing to Him as the greater, to whom their ministries were subordinate, and in whom their teachings centred. Jesus is the goal of all previous revelation, mightier than the mightiest who are honoured by being His attendants. He is the Lord both of the dead and of the living, and the 'spirits of just men made perfect' bow before Him, and reverently watch His work on earth. So much did that appearance proclaim to the mortal three, but their slumber showed that they were not principally concerned, and that the other three had things to speak which they were not fit to hear. The theme was the same which had been, a week before, spoken to them, and had doubtless been the subject of all Jesus' teachings for these 'six days.' No doubt, their horror at the thought, and His necessary insistence on it, had brought Him to need strengthening. And these two came, as did the angel in Gethsemane, and, like him, in answer to Christ's prayer, to bring the sought-for strength. How different it would be to speak to them 'of the decease which He should accomplish at Jerusalem,' from speaking to the reluctant, protesting Twelve! And how different to listen to them speaking of that miracle of divine love expressed in human death from the point of view of the 'principalities and powers in heavenly places,' as over against the remonstrances and misunderstandings with which He had been struggling for a whole week! The appearance of Moses and Elijah teaches us the relation of Jesus to all former revelation, the interest of the dwellers in heavenly light in the Cross, and the need which Jesus felt for strengthening to endure it. Peter's foolish words, half excused by his being scarcely awake, may be passed by with the one remark that it was like him to say something, though he did not know what to say, and that it would therefore have been wise to say nothing.