The word choice is important because it is an alliteration that equates Egypt with evil, and further sets a dark scene in the verse. Satan is compared to Moses who cast a number of plagues upon Egypt. In the book of the Exodus, the impious Pharaoh who Satan is also compared to, is punished by God through Moses who cast plagues that destroyed the lands and water of Egypt. The plagues were consistent of frogs, gnats, flies, boils, pollution of the Nile, and locusts. Milton compares the fallen angels gathering after they have first fallen, to the last plague of locusts. Milton uses the last plague of locusts to symbolize the angels because locust can travel in a vast number. They have been known to swarm two thousand square miles in extent. They are a powerful insect that still plagues and destroys Arabic lands today. Milton choose to compare the angels to a innumerable swarm of insects to reiterate the concept that the fallen angels had no specific number to God according to the story in Luke 12:6 which states that everyone is counted by God. God is said to even embrace and love a little sparrow. In that concept, God loves and has counted us all. Milton uses the image of the plague to describe the angels as innumerable, and to further imply a dark and impious scene. Egypt's evil day is not just a period of twenty-four hours but a longer period that stretches from the enslavement of the Hebrews to the Exodus where Moses punishes the Pharaoh for his impiety. The length of the day implies the vastness of time, and conveys the idea that the angels have fallen indefinitely. The comparison suggests that the angels gathering are a dark and sickening scene, as they are compared to a vast swarm of insects coming to destroy the land of Egypt, and that the impious Pharaoh is the reason the plague was even cast. Satan is the reason these angels fell from heaven, he led them into a battle with God and as their leader he failed and lost the war. Satan's rule is the cause for the angels fall from heaven and as he calls them forth he is still in complete control of them. Milton uses this comparison to imply many aspects of the angels falling into evil. The concept of vastness is evident in more an one aspect of the comparison to Egypt's evil day. The idea of vastness is a comparison to the angels lack of specific placement, number according to God, and consciousness. The angels have just fallen and are still unable to differentiate their placement.