Matt.17:9 – And God’s voice suddenly spoke from the cloud, saying, “This is my dearly loved Son, the constant focus of my delight. Listen to him!”
Jn.5:20 – For the Father loves the Son, and shows Him all things that He Himself is doing;
When the Lord spoke from heaven at the Transfiguration it was very similar to what He had said at the baptism of Jesus. When John the Baptist brought Jesus up out of the water the Father seemed to be overwhelmed with love for His Son; His response was, “This is my Beloved Son in Whom I am well pleased”. At this announcement, the Heavenly Dove, the Holy Spirit, came upon Jesus. Jesus began to experience the power of God’s presence upon His life and ministry. Actually the Father’s statement gives us a glimpse into what this is all about. ‘This is my Beloved’, the Father loves the son with His infinite, unfathomable love. This love is actually a person, the precious Holy Spirit. What the disciples were witnessing on that Holy Mount was unimaginable. They were witnessing the fellowship of love between the Father and Son, the fruit of that love is a person in His own right, the wonderful Holy Spirit. Here is how Jonathan Edwards describes this fellowship.
“It was under this representation that the Holy [Spirit] descended on Christ at his baptism, signifying the infinite love of the Father to the Son, and that thereby is signified that infinite love that is between the Father and the Son; which is further illustrated by the voice which came with the dove, “This is my beloved Son, in whom I am well pleased”. When Christ says to his Father that he would declare his name to his disciples, “that the love wherewith thou hast loved me may be in them,” I can understand nothing else by [it] but that the Holy Spirit might be in them and dwell in them, which is the love of the Father to the Son.”
John remembered this moment all His life. He was a witness of the supernatural fellowship of the trinity at the Transfiguration. At the end of his life he was still proclaiming our calling to enjoy this fellowship ourselves. As a result, this is how John begins his epistle at the end of his life, 1Jn.1:3 – “So we proclaim to you what we have seen and heard about this Life-Giver so that we may share and enjoy this life together. For truly our fellowship is with the Father and with his Son, Jesus, the Anointed One.”