The quote from "Don Quixote" by Miguel de Cervantes reflects the protagonist's deep sense of purpose and commitment to his ideals. Mr. Castilian, a character in the story, emphasizes that everything he does is driven by a belief that his pursuits serve a greater purpose, akin to wielding a weapon in a fight. This highlights the theme of fighting for one's beliefs and passions, even when faced with challenges or opposition.

The phrase "my rest fighting" suggests that rest is not merely a time of inactivity but can also be viewed as a time of preparation and resilience for future battles. This illustrates Don Quixote's relentless spirit, where he sees every moment as an opportunity to engage in his quest. Overall, the quote encapsulates the essence of determination and the relentless pursuit of one's dreams, even in the face of adversity.