The faith of the disciples was greatly strengthened at the transfiguration, when they were permitted to behold Christ's glory and to hear the voice from heaven testifying to His divine character. God chose to give the followers of Jesus strong proof that He was the promised Messiah, that in their bitter sorrow and disappointment at His crucifixion, they would not entirely cast away their confidence. At the transfiguration the Lord sent Moses and Elijah to talk with Jesus concerning His sufferings and death. Instead of choosing angels to converse with His Son, God chose those who had themselves experienced the trials of earth. SR 205.3
Elijah had walked with God. His work had been painful and trying, for the Lord through him had reproved the sins of Israel. Elijah was a prophet of God; yet he was compelled to flee from place to place to save his life. His own nation hunted him like a wild beast that they might destroy him. But God translated Elijah. Angels bore him in glory and triumph to heaven. SR 206.1
Moses was greater than any who had lived before him. He had been highly honored of God, being privileged to talk with the Lord face to face, as a man speaks with a friend. He was permitted to see the bright light and excellent glory that enshrouded the Father. The Lord through Moses delivered the children of Israel from Egyptian bondage. Moses was a mediator for his people, often standing between them and the wrath of God. When the anger of the Lord was greatly kindled against Israel for their unbelief, their murmurings, and their grievous sins, Moses’ love for them was tested. God proposed to destroy them and to make of him a mighty nation. Moses showed his love for Israel by his earnest pleading in their behalf. In his distress he prayed God to turn from His fierce anger and forgive Israel, or blot his name out of His book. SR 206.2
Moses passed through death, but Michael came down and gave him life before his body had seen corruption. Satan tried to hold the body, claiming it as his; but Michael resurrected Moses and took him to heaven. Satan railed bitterly against God, denouncing Him as unjust in permitting his prey to be taken from him; but Christ did not rebuke His adversary, though it was through his temptation that the servant of God had fallen. He meekly referred him to His Father, saying, “The Lord rebuke thee.” Jude 1:9. SR 206.3
Jesus had told His disciples that there were some standing with Him who should not taste of death till they should see the kingdom of God come with power. At the transfiguration this promise was fulfilled. The countenance of Jesus was there changed and shone like the sun. His raiment was white and glistening. Moses was present to represent those who will be raised from the dead at the second appearing of Jesus. And Elijah, who was translated without seeing death, represented those who will be changed to immortality at Christ's second coming and will be translated to heaven without seeing death. The disciples beheld with astonishment and fear the excellent majesty of Jesus and the cloud that overshadowed them, and heard the voice of God in terrible majesty, saying, “This is My beloved Son: hear Him.” SR 207.1