Isaiah 30:25-26 calls our attention to an important principle, a tenet that doubtlessly springs from the merism that lies at the core of God's very nature. As if to emphasize the value of the message, God repeats the principle, using different images, in these successive verses.
That principle is just this: On the heels of destruction will come the forces of restoration. Notice carefully the word when, and the term, in the day, both repeated in these verses. We are left with the real sense that the forces of destruction and construction will appear virtually simultaneously. Maybe not fully concomitant but surely close. The two verses merit closer consideration.
In verse 25, God sends running water on the very day when He brings to nothing the high towers. We learn about these two highly dissimilar incidents—the fall of the towers and the coming of the water—in virtually the same breath. This gives us the impression that God will mercifully begin the healing process soon after the destruction, almost concurrent with it.
Let us look into the imagery a bit. The running water could refer to the Holy Spirit or to information, specifically, the knowledge of God that will eventually cover the earth, as Isaiah declares in Isaiah 11:9: “They shall not hurt nor destroy in all My holy mountain, for the earth shall be full of the knowledge of the LORD as the waters cover the sea.”
Isaiah 41:17-18, 20 echo this thought. In verse 18, God promises He will bring water to barren hills while, in verse 20, He links that water, at least generally, to knowledge about Him.
Returning to Isaiah 30:25, we understand that the high towers could refer to military fortifications. In our context today, they could just as suitably denote institutions such as the IMF, World Bank, or even the United Nations—anything which people rely on as a bastion of strength and a source of protection. As so often is the case, the prophet Isaiah supplies his own commentary. In Isaiah 2:12, 15-17, he defines the tower as anything that represents the pride of mankind. Verse 12 establishes the context as the Day of the Lord, the same timeframe referenced in Isaiah 30 with the time, “in the day.”
Returning to Isaiah 30:25 once more, we understand that the mountains could refer to governments, as in Daniel 2, and “every high hill” could refer to false religious practices, as in I Kings 14:22-24.
In fact, the term “every high hill” appears six other times in the Old Testament, each time referring to the practice of false religion. A similar term, with about the same meaning, “high places” appears no less than ninety times in the Old Testament.
The bottom line regarding Isaiah 30:25 is this: God brings flowing water on barren hilltops at about the same time that He brings to naught mankind's oppressive governments (mountains) and his false religions (high hills).
Turning our attention to Isaiah 30:26, we see much the same thought, dressed in entirely different imagery. In this verse, God says the sun's light, and presumably its heat, will be seven times greater than normal and that the moon will shine as brightly as the sun normally does. That would be quite destructive.
Notice, though, all that takes place when He “binds up the brokenness of His people, and heals the wounds inflicted by His blow.” So again, the act of restoration, stated here with the terms “binds up” and “heals,” is closely linked with the act of destruction. The two acts may not occur fully simultaneously, but they appear to be extremely closely connected in time.
The Goodness and Severity of God (Part One)
Other Forerunner Commentary entries containing Isaiah 30:25: