13I beheld therefore in the vision of the night, and lo, one like the son of man came with the clouds of heaven, and he came even to the Ancient of days: and they presented him before him.
14And he gave him power, and glory, and a kingdom: and all peoples, tribes and tongues shall serve him: his power is an everlasting power that shall not be taken away: and his kingdom that shall not be destroyed.
Saint Jerome wrote an extensive commentary on the Book of Daniel. Here is his commentary on these verses:
Verses 13, 14. “And behold, there came One with the clouds of heaven like unto the Son of man.” He who was described in the dream of Nebuchadnezzar as a rock cut without hands, which also grew to be a large mountain, and which smashed the earthenware, the iron, the bronze, the silver, and the gold is now introduced as the very person of the Son of man, so as to indicate in the case of the Son of God how He took upon Himself human flesh; according to the statement which we read in the Acts of the Apostles: “Ye men of Galilee, why stand ye gazing up towards heaven? This Jesus who has been taken up from you into heaven, shall so come in like manner as ye have seen Him going into heaven” (Acts 1:11).
“. . .And He arrived unto the Ancient of days, and they brought Him before His presence, and He gave unto Him authority and honor and royal power.” All that is said here concerning His being brought before Almighty God and receiving authority and honor and royal power is to be understood in the light of the Apostle’s statement: “Who, although He was in the form of God, thought it not robbery to be equal with God; but emptied Himself, taking the form of a servant, being made in the likeness of men, and was found in His condition to be as a man: He humbled Himself, becoming obedient unto death, even to the death of the cross” (Phil. 2:6-8). And if the sect of the Arians were willing to give heed to all this Scripture with a reverent mind, they would never direct against the Son of God the calumny that He is not on an equality with God.