Question: What is Isaiah writing about in Isaiah 30:25?
Answer:The full passage with some context reads as follows in the NIV:
Isaiah 30:19, O people of Zion, who live in Jerusalem, you will weep no more. How gracious he will be when you cry for help! As soon as he hears, he will answer you. 20 Although the Lord gives you the bread of adversity and the water of affliction, your teachers will be hidden no more; with your own eyes you will see them. 21 Whether you turn to the right or to the left, your ears will hear a voice behind you, saying, “This is the way; walk in it.” 22 Then you will defile your idols overlaid with silver and your images covered with gold; you will throw them away like a menstrual cloth and say to them, “Away with you!”
23 He will also send you rain for the seed you sow in the ground, and the food that comes from the land will be rich and plentiful. In that day your cattle will graze in broad meadows. 24 The oxen and donkeys that work the soil will eat fodder and mash, spread out with fork and shovel. 25 In the day of great slaughter, when the towers fall, streams of water will flow on every high mountain and every lofty hill. 26 The moon will shine like the sun, and the sunlight will be seven times brighter, like the light of seven full days, when the LORD binds up the bruises of his people and heals the wounds he inflicted.
In the whole context there is a description of the judgment that is coming on Israel for its dependence on Egypt to give security from Assyria instead of depending on God, and for their rejection of the prophetic teachers of Israel whom God sent to them to turn them to the correct path. In verse 19 there is a change of perspective. For those who do cry out to God for help there will be help. Prophetic teachers will be sent to them once again, even in the midst of adversity and affliction, and they will hear them giving direction in the straight path. Their stomachs will turn at the thought of giving worship to false idols. God will send them plentiful harvests. And even in the midst of the judgment God brings, “the day of great slaughter, when towers fall,” there will nevertheless be water flowing on the dry mountains and hills to restore the crops and bring healing to the land and its people who repent.
This prophecy was undoubtedly for the people of Isaiah’s day and looking toward the time of restoration from the exile that God forced His people into in 586 B.C. But there is also a future fulfillment to come with the arrival of the great day of judgment and the restoration of God’s kingdom to earth at the climactic return of Christ to rule. What happened to Israel in the past will be replayed in ultimate terms in the future. We might thus see inklings of the Great Tribulation and the Second Coming of Christ leading to the Millennial Kingdom first and the Eternal form of the Kingdom at the end. See Revelation 6-22.