The transfiguration of Jesus Christ was one of the most important moments in the life of the savior of humanity in the world, along with his baptism, his death, and his resurrection; during his transfiguration what happened was simply that Jesus gave a glimpse of his glory and his true divine nature to the three disciples who accompanied him to pray on the mountain, Peter, James, and John.
During his transfiguration, that is, while Jesus revealed his true person clothed with the glory of God, the synoptic gospels that relate the event, Jesus met the prophets Moses and Elijah, they symbolically represented the authority of the old alliance, because Jesus came into the world to perfect all the law and the teaching of the prophets. And while Jesus, Moses, and Elijah were present with the disciples, a voice, the voice of the Father, came down from heaven, and as at the baptism with John in Jordan, the voice confirmed Jesus as the personification of the perfections of God.
This is how the Gospel of Mark recounts the glorious transfiguration of Jesus:
"After six days Jesus took Peter, James and John with him and led them up a high mountain, where they were all alone. There he was transfigured before them. His clothes became dazzling white, whiter than anyone in the world could bleach them. And there appeared before them Elijah and Moses, who were talking with Jesus.
Peter said to Jesus, Ā“Rabbi, it is good for us to be here. Let us put up three sheltersāone for you, one for Moses and one for Elijah.Ā“ (He did not know what to say, they were so frightened)
Then a cloud appeared and covered them, and a voice came from the cloud: “This is my Son, whom I love. Listen to him!“
Suddenly, when they looked around, they no longer saw anyone with them except Jesus" Mark 9:2-8.