Isaiah uses vivid imagery to convey a powerful message about humility and the futility of human pride. The towering mountains and high hills symbolize the grandiose ambitions and self-importance that people often attribute to themselves. In the context of Isaiah's prophecy, these natural features, which are typically seen as symbols of strength and permanence, are portrayed as being brought low. This imagery serves as a metaphor for the humbling of human pride and arrogance before the sovereignty of God.
The verse is part of a larger passage that speaks to the Day of the Lord, a time when God will assert His authority and bring justice to the earth. It emphasizes the idea that no matter how high and mighty humans may consider themselves, they are ultimately subject to God's will and judgment. This message encourages believers to seek humility and to place their trust in God's eternal power rather than in their own temporary achievements. It is a call to recognize the limits of human strength and the enduring nature of divine sovereignty.