Meaning: The quote "Those who have virtue always in their mouths, and neglect it in practice, are like a harp, which emits a sound pleasing to others, while itself is insensible of the music" is attributed to the ancient Greek philosopher Diogenes of Sinope, also known as Diogenes the Cynic. This quote reflects Diogenes' cynicism and his criticism of individuals who espouse virtuous ideals but fail to embody them in their actions.

Diogenes was a prominent figure in the school of philosophy known as Cynicism, which advocated for a simple and ascetic way of life. He was known for his provocative and unconventional behavior, as well as his sharp wit and biting criticism of societal norms and conventions.

In this particular quote, Diogenes is drawing a metaphorical comparison between individuals who talk about virtue but do not live up to it and a harp that produces beautiful music for others to hear, while remaining unaware of the music itself. The implication is that these individuals may speak eloquently about virtue and morality, but their words are hollow if they do not embody these principles in their daily lives.

The analogy of the harp emitting pleasing sounds while being insensible of the music serves as a powerful critique of hypocrisy and the superficiality of mere words without corresponding actions. Diogenes is highlighting the discrepancy between professed virtues and genuine moral behavior, emphasizing the importance of integrity and authenticity in ethical conduct.

The quote also underscores the Cynic philosophy's emphasis on living in accordance with nature and rejecting societal conventions and pretenses. Diogenes and his followers believed in the pursuit of virtue through simplicity, self-sufficiency, and a rejection of material possessions and social status. For them, true virtue was not found in outward displays of moral rhetoric, but in the authentic and unadorned way of life that aligned with nature and reason.

Diogenes' critique of moral hypocrisy and empty rhetoric remains relevant in contemporary society. It serves as a reminder of the importance of integrity and genuine moral conduct, transcending mere lip service or performative displays of virtue. The quote challenges individuals to reflect on the alignment between their words and their actions, urging them to embody the virtues they espouse rather than merely professing them.

In conclusion, the quote attributed to Diogenes encapsulates his cynicism and his critique of individuals who speak of virtue but fail to live by it. Through the metaphor of the harp emitting pleasing sounds while being insensible of the music, Diogenes emphasizes the hollowness of moral rhetoric without corresponding actions. His words serve as a timeless reminder of the importance of authenticity and integrity in ethical conduct, resonating across centuries and inviting reflection on the true essence of virtue.