Ticonius — on Rev 8:12 (COMMENTARY ON THE APOCALYPSE 8:12)

“The sun, moon and stars represent the church, a third part of which is struck. This third is a designation, not a quantity. For there are two peoples within the church, that part of God, which is compared with the light, and that part of the devil, which is surrounded by the darkness of shadows, as the Scripture says, "I have compared your mother to the night." And this part was struck so that it might become apparent who is of God and who of the devil. It has been given over to its own sins and desires, so that their faults that have remained hidden and unknown to all might be revealed.”