Gregory the Great — on Isa 14:13 (Forty Gospel Homilies, Homily 34)

“Michael indeed means "Who is like God"; Gabriel, "the strength of God"; and Raphael is called "the medicine of God." And whenever something of wondrous power is accomplished, Michael is said to be sent, so that from the act itself and the name it may be understood that no one can do what God is able to do. Hence that ancient enemy, who through pride desired to be like God, saying: "I will ascend into heaven, I will exalt my throne above the stars of heaven, I will sit on the mountain of the covenant, on the sides of the north, I will ascend above the height of the clouds, I will be like the Most High," when at the end of the world he is left to his own power to be destroyed by the final punishment, is said to be about to fight with the archangel Michael, as it is said through John: "There was a battle with the archangel Michael," so that he who proudly raised himself to the likeness of God, slain by Michael, might learn that no one rises to the likeness of God through pride.”