As Tobit approaches the end of his life, he witnesses the fulfillment of a prophecy regarding the fall of Nineveh, the city that had been a symbol of oppression and sin. The captives being led into Media signify the end of an era of dominance by Nineveh and Assyria. Tobit's response is one of praise and gratitude to God, acknowledging His justice and sovereignty. Despite the city's destruction, Tobit sees this as a demonstration of God's righteousness and His ability to bring about justice in His own time.
Tobit's reaction is a testament to his unwavering faith and trust in God, even in the face of adversity. He understands that God's plans are ultimately for the good of His people, and this realization brings him joy and peace. This passage encourages believers to trust in God's timing and His ability to bring about justice, even when it seems delayed. It serves as a reminder that God's ways are higher than ours, and His plans are always for the ultimate good of His creation.