Rev 1:12-16
"Then I turned to see the voice that was speaking to me, and on turning I saw seven golden lampstands, and in the midst of the lampstands one like a son of man, clothed with a long robe and with a golden sash around his chest. The hairs of his head were white, like white wool, like snow. His eyes were like a flame of fire."
The vision of glorified Christ combines images from Daniel 7 (Son of Man), Daniel 10 (the heavenly being), and Ezekiel 1 (divine glory). Each element is symbolic: priestly garments, white hair (eternity/wisdom), eyes of fire (penetrating omniscience), bronze feet (judgment), voice like many waters (irresistible majesty), sword from the mouth (Word of God).
Rev 1:17-18
"When I saw him, I fell at his feet as though dead. But he laid his right hand on me, saying, ‘Fear not, I am the first and the last, and the living one. I died, and behold I am alive forevermore, and I have the keys of Death and Hades.’"
John’s reaction (falling as dead) is the appropriate response to the vision of divine glory (cf. Isa 6, Ezek 1, Dan 10). Christ identifies himself: First and Last (eternal deity), Living One who died (incarnation and crucifixion), Alive forever (resurrection and exaltation), Holder of the keys of death and Hades (sovereignty over death).