Matthew 17:5

A shining cloud came over them. This cloud would be immediately accepted by the disciples as showing God's presence. In the Old Testament era, a shining cloud signaled the presence of the Lord. This is my own dear Son. The same voice heard at his baptism (Matthew 3:17). This confirms Peter's declaration (Matthew 16:16). Almost a generation later, Peter emphasized that they had been eyewitnesses of these things (2 Peter 1:16-21). Listen to him! Luke says when the voice stopped, there was Jesus all alone. In this way God showed that both Moses (the Law) and Elijah (the Prophets) were fulfilled and superseded. "But in these last days he has spoken to us through his Son" (Hebrews 1-2). Jesus Christ (therefore the New Testament) is the ONLY source of Truth and Life in this final age of time.