The quote "A man can live on his wits and his balls for only so long" from Hunter S. Thompson's The Rum Diary reflects the idea that while cunning and bravery can take a person far, they are not sustainable ways to navigate life. Thompson suggests that relying solely on one's instincts and bravado can lead to a temporary existence but ultimately requires more substantial foundations for success and fulfillment.

This statement encapsulates a central theme in Thompson's work, highlighting the tension between reckless living and the need for deeper values. The character embodies a lifestyle that thrives on spontaneity and risk, but the quote serves as a reminder that such an approach may not be viable in the long term, prompting readers to consider what true stability means.