What does Isaiah 17:10 mean?
What began as an oracle against Damascus (Isaiah 17: 1) has become a conversation between the Lord and His people, Israel. In one sense, Israel will share in the judgment on Damascus, because of their foolish alliance against the Assyrians. In another sense, that alliance will cause Damascus to share with Israel the consequences of Israel's faithlessness to the Lord. Isaiah has written in the previous verses that the strong cities, both in Israel and Syria, will be abandoned. This emptying will be following the Lord's judgment in the form of the Assyrian invasion. That invasion will reduce the population of both nations to a feeble remnant (Isaiah 17:2–3).Now the Lord reminds Israel of why this fate will happen. They have forgotten the God who saved them. They have failed to remember the "Rock of their refuge." This forgetting is exactly what the Lord warned His people about repeatedly in Deuteronomy. "And if you forget the Lord your God and go after other gods and serve them and worship them, I solemnly warn you today that you shall surely perish. Like the nations that the Lord makes to perish before you, so shall you perish, because you would not obey the voice of the Lord your God" (Deuteronomy 8:19–20).
God is reminding His people of His warnings not to forget. They have had the consequences in writing for generations. They have seen the results in their own history (Judges 2:16–19). This was not new information. When the Lord calls them to "remember," this means more than simply being aware in their minds. The people of the Lord have a solemn responsibility, from generation to generation, to do whatever it takes to remember the Lord's faithfulness to them. They are to be intentional about relying on, and obeying, Him.
Because Israel has failed to remember once more, they will again experience catastrophe. No matter how carefully they work to provide for themselves, this sorrow will still come. Isaiah describes this self-reliance as tending a plant. You carefully select the best one for the fruit it should provide. Here the passage uses the example of getting a cutting from a stranger, symbolizing the other nations and their gods, to plant and grow your own plant. In the end, though, you lose the harvest because you depended on another, or yourself, instead of on the Lord (Isaiah 17:11).