The struggle against an obstacle inevitably propels the fighter to a new level of functioning. The extent of the struggle determines the extent of the growth. The obstacle is an advantage, not adversity. The enemy is any perception that prevents us from seeing this.
The idea presented in the quote emphasizes that encountering challenges can lead to significant personal development. Instead of viewing obstacles as setbacks, they can be perceived as opportunities for growth. The intensity of the struggle one faces correlates with the depth of the growth experienced. By embracing difficulties, individuals can unlock new levels of capability and understanding.