Commentators emphasize that this was no ordinary party. Belshazzar held this extravagant feast while the mighty Persian army, led by Cyrus, was actively besieging Babylon. Scholars like Calvin and Henry see this as an act of stunning arrogance and "complacency," a defiant indulgence in pleasure that blinded the king to his imminent ruin. It serves as a stark warning about how pride and sensuality can precede a fall.