Adam Clarke's Commentary on the Bible - Revelation 9:2
He opened the bottomless pit - Το φρεαρ της αβυσσου· The pit of the bottomless deep. Some think the angel means Satan, and the bottomless pit hell. Some suppose Mohammed is meant; and Signior Pastorini professes to believe that Luther is intended! There arose a smoke - False doctrine, obscuring the true light of heaven. read more
Adam Clarke's Commentary on the Bible - Revelation 9:1
A star fall from heaven - An angel encompassed with light suddenly descended, and seemed like a star falling from heaven. The key of the bottomless pit - Power to inundate the earth with a flood of temporal calamities and moral evils. read more