What does Isaiah 13:10 mean?
The "day of the Lord" (Joel 1:15; Ezekiel 30:3) is coming for Babylon (Isaiah 13:6). Isaiah has been describing the Lord's impending judgment on Babylon for its sins, especially sins of "the pomp of the arrogant" and "pride of the ruthless" (Isaiah 13:11). The language Isaiah uses here echoes other descriptions of God's judgment throughout Scripture. Regarding a future event, from Isaiah's point of view, he states that stars and constellations will fail to give light. Even the sun will be dark as it rises in the sky. The moon will give no light. What is going on here? There are two possibilities.First, it is possible Isaiah is straightforwardly predicting literal darkness: that when God brings His judgment against Babylon, it will come with supernatural shadow. Perhaps the Lord was promising to miraculously block off any light from the sun, moon, and stars. This utter darkness would add to the terror and confusion experienced by those destroyed by God for their terrible sinfulness. Of course, this would also affect the nations God had assembled for this purpose, none of whom thought they were serving the Lord of Israel (Isaiah 13:4–5).
The more likely explanation is poetic. In modern English, for instance, terrible events are often referred to as "dark days" or "dark times." Later phrases seem to carry a symbolic nature, as well (Isaiah 13:13). This reference to sun, moon, and stars was also a direct challenge to the religious beliefs of the Babylonians and other peoples of the Mesopotamian region. Many of them understood lights in the sky to be gods of various kinds. They tracked their movements in the sky. This region believed in astrology: that specific alignments of those heavenly bodies predicted and determined human fate. They used their charts to develop horoscopes to make decisions about how to lead their lives. All of this is a form of idol worship in defiance of the Maker of those objects.
Isaiah may be saying that on the day of God's judgment, the false gods of the stars, sun, and moon will be impotent. No help or guidance will come to the people of Babylon from what they had worshipped. It will quickly become obvious that they were foolish to place their trust in the objects of the heavens instead of in the Lord God of Israel.