Absolute power and the illusion of secrecy often breed a dangerous moral blindness. For a great empire like Babylon, arrogance and a false sense of security paved the way to its ultimate downfall. The primary approach among commentators is that this misplaced trust was rooted in sorcery and idolatry. These practices were evil in the eyes of God, yet the empire relied on them rather than trusting in Him [רד״ק, מצודת דוד, ביאור שטיינזלץ]. Another perspective suggests that the issue was not necessarily trusting in the evil itself, but rather living in a state of careless complacency. They committed terrible acts while feeling completely secure, entirely unafraid of any future judgment or punishment [שד״ל].
This extreme overconfidence was fueled by the illusion of invisibility. Because practices like sorcery were conducted in the shadows, the empire began to believe that no one was watching, assuming that even God did not oversee their actions [רד״ק, מצודת דוד, שד״ל]. On a psychological level, a person who does wrong might eventually change their ways out of social shame or a sudden realization of their mistake. However, having convinced themselves that their actions were completely hidden, they lost all sense of social shame and felt no need to correct their behavior [מלבי״ם].
A second factor that prevented any moral correction was their highly praised wisdom and knowledge. This was not a positive, moral intellect, but rather a corrupted knowledge focused on heresy, dark arts, and the false belief that they could control higher powers [אבן עזרא, רד״ק, מלבי״ם, ביאור שטיינזלץ]. Instead of refining their character, this flawed wisdom only fueled their rebellion and stubborn refusal to accept any higher authority [רש״י, מצודת ציון, אבן עזרא]. Their dark intellect and wicked hearts hardened their resolve, leading them far away from the proper moral path followed by the rest of humanity [רש״י, רד״ק, מלבי״ם].
This downward spiral of self-deception reached its peak in a brazen display of absolute arrogance. Intoxicated by their own imagined greatness, they convinced themselves that they were entirely unmatched. They believed there was no other power, leader, or wise person in existence but them, and that they answered to absolutely no one, human or Divine [אבן עזרא, מצודת דוד, מלבי״ם, ביאור שטיינזלץ].