The verse concludes by stating the enemy will be destroyed 'because he has done great things.' How can doing 'great things' lead to destruction?
The phrase 'because he has done great things' is a crucial clue. It doesn't mean the enemy is destroyed because of his achievements in a positive sense. Instead, it refers to the enemy's proud, overweening actions and destructive might. This 'greatness' was likely an expression of their arrogance, their self-magnification, and their devastating impact on others.
God uses these 'great' and terrible acts as the very reason for the enemy's downfall. Their pride and the extent of their cruelty become the measure of their judgment. It's a profound statement of God's sovereignty: He is the one who ordains their rise and their fall. What they considered their 'great things' were, in God's plan, the seeds of their own destruction.
This teaches us that human pride and destructive power, no matter how immense they may seem, are ultimately subject to God's ultimate authority and judgment.