Facing a massive enemy army with a force of only three hundred men creates an overwhelming situation. In the middle of the night, God commands Gideon to launch an attack, promising him absolute victory. Yet, because the odds are so heavily stacked against him, Gideon requires an extra boost of courage before the battle actually begins [אברבנאל].
God's primary instruction is for Gideon to charge directly into the enemy camp to fight and conquer it. However, a spirit of bravery cannot take hold of a person who is experiencing fear. Therefore, God provides an intermediate step. If Gideon is afraid, he is told to first go down toward the camp, stand at a distance, and listen to what the enemy soldiers are saying [מלבי״ם]. The purpose of this listening mission is to build his confidence.
Gideon approaches the outer edge of the camp, specifically the area where the armed guards are stationed. According to standard military tactics, weak individuals and livestock were kept in the center of the camp, while seasoned warriors formed an outer ring to protect against attacks [אברבנאל]. Approaching these heavily armed guards at the perimeter is a deliberate choice. When Gideon hears that the strongest and bravest fighters are trembling with fear, he realizes that the entire enemy camp is consumed by terror [אברבנאל, מלבי״ם]. This realization gives him the courage he needs, fully preparing him to carry out God's original command to charge directly into the camp and begin the battle [מלבי״ם].