Revelation 8:12

And the fourth angel sounded,.... His trumpet. Some think this refers to the Eutychian heresy, which confounded the two natures of Christ, and of two made one mixed nature, neither human nor divine; and brought great darkness upon the doctrine of Christ's person, the sun of righteousness and into the church, signified by the moon, and among the ministers of the word, the stars.

For in this not the third part of the earth, or sea, or rivers only, but of all who are under the sun, are affected. And the day shone not for a third part thereof - That is, shone with only a third part of its usual brightness.

The third part of the sun - moon - stars, was smitten - Supposed to mean Rome, with her senates, consuls, etc., eclipsed by Odoacer, king of the Heruli, and Theodoric, king of the Ostrogoths, in the fifth century. But all this is uncertain.

This partial obscuration, therefore, comes between the prayers of the martyrs under the fifth seal, and the last overwhelming judgments on the ungodly under the sixth seal, at the eve of Christ's coming. the night likewise--withdrew a third part of the light which the bright Eastern moon and stars ordinarily afford.

And the fourth angel sounded - See the notes at Rev 8:6-7. And the third part of the sea was smitten - On the phrase the third part, see the notes on Rev 8:7. The darkening of the heavenly luminaries is everywhere an emblem of any great calamity - as if the light of the sun, moon, and stars should be put out. See the notes on Rev 6:12-13. There is no certain evidence that this refers to rulers, as many have supposed, or to anything that would particularly affect the government as such. The meaning is, that calamity would come as if darkness should spread over the sun, the moon, and the stars, leaving the world in gloom. What is the precise nature of the calamity is not indicated by the language, but anything that would diffuse gloom and disaster would accord with the fair meaning of the symbol. There are a few circumstances, however, in regard to this symbol which may aid us in determining its application: (1) It would follow in the series of calamities that were to occur. (2) It would be separated in some important sense - of time, place, or degree - from those which were to follow, for there is a pause here Rev 8:13, and the angel proclaims that more terrible woes are to succeed this series. (3) Like the preceding, it is to affect “one third part” of the world; that is, it is to be a calamity as if a third part of the sun, the moon, and the stars were suddenly smitten and darkened. (4) It is not to be total. It is not as if the sun, the moon, and the stars were entirely blotted out, for there was still some remaining light; that is, there was a continuance of the existing state of things - as if these heavenly bodies should still give an obscure and partial light. (5) Perhaps it is also intended by the symbol that there would be light again. The world was not to go into a state of total and permanent night. […]