Facing a stubborn and hostile crowd requires an extraordinary level of mental resilience. To prepare His prophet for this difficult task, God grants him the profound inner strength necessary to stand directly and firmly in front of the opposing people [מצודת ציון]. The primary approach among commentators is that God provides this assurance to help the prophet remain steady against the constant arguments and harsh pushback from his audience [ביאור שטיינזלץ]. He is empowered to be entirely bold, ensuring that he does not show even the slightest hint of fear or submission [מצודת דוד, רד״ק].
God's empowerment is described through a two-fold toughening of the prophet's resolve. One perspective views this dual description simply as a repetition designed to emphasize the sheer intensity of the courage being granted [מצודת דוד]. However, another approach reveals a more specific, double-layered armor provided by God. First, the prophet is fortified with a boldness that completely eliminates fear, ensuring he will never surrender or be terrified of any harm the people might try to inflict [מלבי״ם, רד״ק]. Second, he is granted a hardened determination to remove any sense of shame, guaranteeing that he will not feel the slightest embarrassment while standing directly before them [מלבי״ם].