The Day of Judgment will bring a dramatic transformation to the world. God's presence, once hidden, will be revealed with overwhelming power, striking fear into the hearts of the nations while offering absolute security to the Israelites.
God's presence returning to Jerusalem is compared to a great, thundering roar. This sound is designed to terrify the nations, serving as retribution for their past actions against Zion [רש״י, מצודת דוד, אבן עזרא]. While some commentators view the dual description of a roar and a raised voice as a form of poetic emphasis [מצודת דוד], others draw a distinction between the two. In this view, Zion, as the primary center of the Divine Presence, releases a loud, public roar of judgment, whereas Jerusalem emits a continuous, unending voice of divine leadership [מלבי״ם].
The resulting upheaval across the heavens and the earth unfolds on multiple levels. On an earthly plane, it represents a state of universal panic, confusion, and darkness enveloping the globe [אבן עזרא, ביאור שטיינזלץ], with some interpreting it as a literal earthquake striking the land of Israel [רד״ק]. On a cosmic and spiritual level, this shaking symbolizes the suspension of the laws of nature and the heavenly order [מלבי״ם]. It also signifies God striking down the spiritual guardian angels of the nations in the heavens before bringing judgment upon the nations themselves on earth [רש״י, מצודת דוד].
Amidst this global upheaval and fear, God provides a secure, fortified haven for the Israelites, ensuring they remain completely unharmed by the disasters and earthquakes devastating the nations. The divine promise implies that even the attribute of strict justice, including God and His heavenly court, will mobilize specifically to protect them [חומת אנך].
This promise of security is divided into two distinct levels of care. The first acts as a refuge, providing a cover and a hiding place [רש״י, מצודת ציון]. This represents a passive form of protection, shielding the people from harm simply because they belong to God [מלבי״ם, חומת אנך]. The second level offers a stronghold of active strength and power [מצודת ציון]. This higher degree of empowerment is granted to them specifically as the children of Israel, a title reflecting their supernatural spiritual standing and the enduring merit of their ancestors. Through this active strength, they are enabled to overcome challenges directly using God's power, without the need for any intermediaries [מלבי״ם, חומת אנך].