Instead of yielding to the fear of mortal rulers or human armies, true security comes from directing all awe and reliance entirely toward the Creator. Treating God as holy means depending completely on Him, honoring His name [מצודת דוד], and listening to His commandments [מלבי״ם]. Because it is human nature to fear what is holy, God alone must be the exclusive focus of this respect [אבן עזרא]. People must not elevate or empower mortal kings; that devotion belongs exclusively to God [אברבנאל].
Recognizing God as the master of all forces, both heavenly and earthly, brings a distinct promise. Because He commands the armies of war, honoring Him ensures that He will protect His people from the physical enemy armies threatening them on the ground [רד״ק, אברבנאל]. Consequently, all fear must be reserved for God alone. There is no reason to be terrified of any human enemy, regardless of their military might, such as the forces of Sennacherib or Rezin [מצודת דוד, רד״ק, אברבנאל].
This dynamic of fear actually works in two directions. While God is the proper object of awe, He also casts a protective dread over His people. This ensures that their enemies will be genuinely terrified of them, replacing imagined anxieties with real security [מלבי״ם, ביאור שטיינזלץ].
The primary approach among commentators views God's role here as a source of immense strength. He fortifies those who trust Him, granting them the power to withstand enemy attacks unharmed. In a poetic turn of language, a concept previously associated with fear is transformed to describe the profound power and safety God provides [שד״ל]. Conversely, another perspective maintains the theme of fear, understanding that God Himself is the ultimate source of true terror, far surpassing any earthly threat [אבן עזרא, שד״ל].