A bright cloud overshadowed them — i.e., our Lord, Moses, and Elias. To the disciples this would, we cannot doubt, recall the “cloudy pillar” which had descended on the first tabernacle (Exodus 33:9), the “cloud that filled the house of the Lord on the dedication of the Temple” (1 Kings 8:10). It was, in later Jewish language, the Shechinah, or abiding presence of Jehovah — the very form of the word connects it with both the Hebrew (mishkan) and the Greek (skené) words for tabernacle — which was the symbol that He was with His people. The Targums, or Paraphrases, of the Law and Prophets which were then current, had used the word as a synonym for the divine name. Where the Hebrew text had had “I will dwell in thee,” the Targum of Jonathan had “I will make my Shechinah to dwell” (Zechariah 2:10; Zechariah 8:3). Its appearance at this moment, followed by the voice out or the cloud, was a witness that no tabernacle made with hands was now needed, that the humanity of Christ was the true tabernacle of God (comp. Note on John 1:14), and that it was in this sense true that “the tabernacle of God was with men” (Revelation 21:3), and that He would dwell with them.
This is my beloved Son. — The words were in substance the same as those heard at the baptism of our Lord (see Note on Matthew 3:17), but the difference in their form is suggestive. Then they were addressed to the human consciousness of the Son of Man, as declaring to Him the greatness of His being. Now they come addressed as to the disciples, and in close connection with the “decease” which was to be accomplished at Jerusalem. It was, if we may so speak, because the Son of Man became obedient unto death that He was showing Himself worthy of the Father’s love. In the hour of darkness and seeming failure, and agony and death, He was “satisfying” His Father’s “good pleasure,” and accepted by Him as the one perfect sacrifice. And so the command, “Hear ye Him,” gained a new significance. Not the traditions of the elders, or the doctrines of the scribes and Pharisees, not even the teaching of Moses and Elias, of the Law and of the Prophets, but the words of the Son of Man, were henceforth to command their allegiance, and to be the guide of their faith and of their lives, for of them only it was true that the Father was revealed fully in them (Hebrews 1:1-2), and that they should never pass away (Matthew 24:35).