Our primary focus will be upon the divine Sonship of Jesus of Nazareth. Notice that we say Jesus of "Nazareth" here instead of Jesus "Christ." Prior to the events which we shall take up, Jesus had been identified simply as "the Nazarene," "the carpenter," or "the carpenter’s son." Following two specific events, his identity is enlarged upon to include "divine Sonship." What happened? There was a baptism and a transfiguration.
Baptism. The practice of baptism was not the peculiar invention of Christianity. Other religions, in fact, political systems, had long observed a form of "washing" or "sprinkling with water" as an initiatory act of accepting "outsiders" into their fellowship. John’s baptism, insofar as it was the "baptism of repentance" (Mark 1:4), was distinguished from the others. He proclaimed that one mightier than himself soon would come whose baptism was still yet different than his: "I indeed have baptized you with water; but he shall baptize you with the Holy Ghost" (Mark 1:8). The difference is further realized in that there is no record of Jesus ever having baptized anyone with water. However, Jesus of Nazareth submitted himself for John’s water baptism in order to 1. identify himself with John’s message, 2. receive the public blessing of God through a symbolic act that all would understand, and 3. certify his divine Sonship. "And it came to pass in those days that Jesus came from Nazareth of Galilee, and was baptized of John in the Jordan ... and there came a voice from heaven, saying, ‘Thou art my beloved Son, in whom I am well pleased’ " (Mark 1:9-11).
Transfiguration. Six days following the baptism, Jesus took Peter, James, and John and withdrew to the top of a mountain, possibly Mount Hermon. There, he was "transfigured;" that is to say, in a moment of spiritual union with God the Father, his countenance was transformed. Even his garments became glistening, intensely white (Mark 9:3), and Moses appeared with Elijah to speak with him. A cloud, long identified with the presence of God, i.e., "firey, cloudly pillar," overshadowed them, and a voice spoke from the cloud; "This is my beloved son; listen to him" (Mark 9:7). Dramatically, the carpenter’s son was now understood to be the "Son of God."
There is also one other noteworthy reference in our selected scripture. In Mark 9:5, James, Peter, and John wanted to erect three booths (or tabernacles) on a sacred spot and remain there in the afterglow. Moses had been tempted to do the same thing following his own mountaintop experience. However, it has always happened, it seems, that following high moments on a "mountain top," there is work to do in the valleys. To formalize a religious experience and not share it with others, or to interpret it through our lives, is to miss the point of the experience itself. Peter, James, and John built no shrine; they became living messages of the one to whom they said, "Truly, you are the Son of God" (Matthew 14:33).