Rev 1:17

“And when I had seen him, I fell at his feet as dead. In this passage John signifies Christ's limbs, and the angel signifies Christ specifically. Therefore John falls as dead at the angel's feet because the Church follows Christ's footprints to die to the world. It is appropriate to say that he is as dead, because even if the Church dies to the world and to vices, it still lives to God. And he laid his right hand upon me, saying: Fear not. The right hand of the angel in this place represents the preachers. Hence it is said by Moses, In his right hand a fiery law, [Deut. 33:2] that is, in the holy preachers the teaching of the Holy Spirit. It is not mentioned at all what the angel did with his hand laid upon him, but we deduce with a certain reasoning that he lifted up from the ground either John or the Church in him. Now, can it be that the Church was put away from the imitation of the sufferings of Christ? No. Therefore the angel laying his hand upon John who lay at his feet as dead and raising him from the ground, is the Redeemer Lord lifting up the Church which imitates his sufferings from sorrow of the heart to the hope of future glory by encouraging it through the holy preachers, as in The sufferings of this time are not worthy to be compared with the glory to come, that shall be revealed in us. [Rom. 8:18] He fittingly says Fear not, as if the Lord were saying to the Church, "Receive confidence from above, and drive human fear away." I am the First and the Last, and I was alive, and dead, and behold I am living for ever and ever. Here it is made clear that this angel specifically bore the person of the Lord Jesus Christ, whom all this corresponds to. And have the keys of death and of hell. By the keys is represented the divine judgment's power, which no one can escape, but it shuts everyone in like a key, according to this: He shutteth, and no man openeth; [Rev. 3:7] by death is meant the one about whom it is written, By the envy of the devil, death came into the world; [Wis. 2:24] and by hell are represented those who belong to him. So with one set of keys the Devil is released to tempt the Church, and with the other he is bound; whence it is written, God is faithful, who will not suffer you to be tempted above that which you are able. [1 Cor. 10:13]”

“Thoroughly terrified by fear of his weakness, insignificance and inferiority, he fell down, not falling only to some degree, but wholly giving himself over to the Lord in humility and faith. And, therefore, the Lord also felt compassion in view of this most pious devotion. "He laid his right hand on me, saying, 'Fear not.' " Here he both rewards faith and strengthens the faithful, who is terrified not by unbelief but by an awe-filled wonder, and he urges John not to fear.”

“It is customary for the holy prophets to see a vision and be struck with awe, revealing human weakness; and how much the divine surpasses the human and excels it with incomparable differences. This we also know from Joshua the son of Nave, when he saw the chief commander of the Lord's army (Jos. 1:9), and Daniel the man of desires in the visions that appeared to him. (Dan. 10:11; 8:17) "I," therefore, "fell at his feet as though dead," says the evangelist, struck with awe at the vision. "And he placed his right hand upon me, saying, 'Do not be afraid.'" The holy John could not have survived the terror if he had not leaned upon the saving right hand of the Son of God, which alone worked the greatest wonders by touch; and he says to me, "I am the first and the last." Thus he spoke: "I am the one who, at the end of the ages, came to dwell with you in the flesh for the salvation of all of you, I am the first and the firstborn of all creation (Col. 1:15). How then could it be possible for you to suffer any harm from my presence?" For if, being alive and the source of life, I became dead for your sake and again came to life after having trampled down death, how is it possible for you, who are alive through me and through my vision, to become dead? If "I" too "hold the keys to death and Hades," so that I may kill or bring to life whomever I wish, leading them down to Hades and raising them up according to what is written about me, and as the prophet says, the pathways of death belong to me (Prov. 12:28), I would not send my worshippers and disciples prematurely to death.”