Matt.17:5 – While he was still speaking, a bright cloud overshadowed them, and behold, a voice out of the cloud said, “This is My beloved Son, with whom I am well-pleased; listen to Him!”
Christ is the very image of the Father. He is absolutely perfect and is the display of the Father in every way. The Father loves the Son, the Father has always loved the Son, the transfiguration just gives us a glimpse into this heavenly intimacy. The disciples had not tasted this life at this point in the gospel narrative. This was just a glimpse into the fellowship they would soon enjoy. They were privileged to observe this intimacy. After Pentecost they too would begin to taste it. Paul said that we are seated together in heavenly places in Christ. The transfiguration gives us a taste of what we now have. Here is a quote from Matthew Henry on this passage.
“The great gospel mystery revealed; This is my beloved Son, in whom I am well pleased. This was the very same that was spoken from heaven at his baptism; and it was the best news that ever came from heaven to earth since man sinned. It is to the same purport with that great doctrine, That God was in Christ, reconciling the world unto himself. Moses and Elias were great men, and favorites of Heaven, yet they were but servants, and servants that God was not always well pleased in; for Moses spoke unadvisedly, and Elias was a man subject to passions; but Christ is a Son, and in him God was always well pleased. Moses and Elias were sometimes instruments of reconciliation between God and Israel; Moses was a great intercessor, and Elias a great reformer; but in Christ God is reconciling the world; his intercession is more prevalent than that of Moses, and his reformation more effectual than that of Elias.”
Today, the Son of God has entered into this glory that was glimpsed that day on the Mount of Transfiguration. He reigns on the throne with His Father, ruling the universe as the Son of God. The good news is that He sits in heaven representing me and interceding for me before the Father. Moses and Elijah were voices pointing us to Him. Today, God is speaking to us through His very own Son. He is calling us into this mystery of heavenly fellowship so that we too can be transformed and radiate His glory.