John Chrysostom
The blessings must ultimately serve a righteous purpose. Observe how God instructs us through the fear of retribution. Initially, He foretold the destiny of the Babylonians, then the Syrians, and the peoples of the western Greeks. It appears that through this, He aimed to reveal something significant: that His glory would shine across the entire earth, particularly among the Babylonians, who at that time ruled over numerous lands. This was so they might not claim victory for themselves, but recognize that it was God who empowered them to dominate various nations and Greeks from the western regions. But why is this so? Because they aim to consume Israel with insatiable greed. Notice that he ultimately seeks shelter from their power.
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Yet despite all this, His anger remains unappeased, and His hand is still extended. These statements indicate that either, after receiving so many warnings, they had yet to reform, or that God would refrain from bringing punishment to its fullest measure; as becomes clear from the subsequent verses, it is about the people.