Meaning of the Spanish proverb 'The thief believes everyone is of his condition'

The well-known Spanish proverb, "Cree el ladrón que todos son de su condición," translates to "The thief believes everyone is of his condition." This saying delves into a fundamental aspect of human psychology: the tendency to project one's own characteristics, especially negative ones, onto others. It suggests that individuals who engage in dishonest or unethical behavior often assume that everyone else operates with the same mindset and moral compass. This projection serves as a defense mechanism, allowing them to rationalize their actions by believing their behavior is commonplace or even normal within the broader human experience. The proverb highlights a universal human trait, observed across cultures and time periods, where people interpret the world and the actions of others through the lens of their own experiences and perceived shortcomings. Its enduring relevance is noted in contemporary psychological understanding, underscoring how our internal states shape our external perceptions and judgments of others.