The quote from Miguel de Cervantes Saavedra's "Don Quixote de la Mancha" symbolizes the deep emotional and spiritual connection between a knight and his lady. The knight’s identity, purpose, and livelihood are intertwined with the presence of his beloved, signifying that to remove her is to strip him of his essence and vitality. This relationship underscores the importance of love and devotion in shaping one’s identity and motivations.

Furthermore, the imagery used in the quote highlights how a knight's vision, enlightenment, and sustenance are linked to his lady's love. The idea that losing her is equivalent to losing his eyes, the sun, and his very means of existence illustrates the profound impact of love on one's life. This poignant relationship reflects the broader themes of chivalry, honor, and the ideal of love that permeate Cervantes' work.