The quote from Arturo Pérez-Reverte's "Good Men" highlights a critical perspective on self-sabotage within society. It suggests that often, individuals or communities undermine their own progress and success, acting as their own worst enemies. This self-destructive behavior can prevent the flourishing of talent and potential, as people too frequently extinguish the brilliance of others out of jealousy or fear.

Furthermore, the emphasis on the "Spaniards" serves to illustrate a historical or cultural context, implying that regional traits can contribute to this phenomenon. The notion of turning off lights where they shine reflects a broader human inclination to stifle excellence instead of nurturing it. In essence, the phrase reminds us of the importance of supporting one another to cultivate a thriving and vibrant society.