If an ass goes travelling he will not come home a horse.

In this quote, Thomas Fuller uses the metaphor of an ass going on a journey and returning unchanged as a horse to convey a lesson about identity and fundamental nature. Fuller is suggesting that no matter how far an individual goes or what experiences they have, they cannot change their essential nature or identity. The saying implies that a person cannot become something entirely different just through external experiences or circumstances. Like an ass that cannot become a horse simply by traveling, a person's true nature remains intact regardless of the changes or influences they encounter.

Fuller's statement reflects a broader idea about the limits of transformation. It conveys the notion that while people may evolve or adapt in various ways, there are certain core aspects of their character, personality, or capabilities that cannot be altered by external factors alone. This idea can be seen as a commentary on the nature vs. nurture debate, where the nature of an individual often shapes their potential and limits, regardless of the experiences they undergo.

The quote also touches on the idea of self-awareness and acceptance. By comparing the ass to a horse, Fuller suggests that individuals should acknowledge and embrace their true selves. Trying to force a change that contradicts one's inherent qualities might not only be futile but also result in frustration or dissatisfaction. The saying encourages authenticity and the understanding that while growth is possible, we should not lose sight of what makes us who we truly are.

Ultimately, this quote serves as a reminder that while personal growth and change are important, they cannot alter the fundamental traits that define us. It emphasizes the value of knowing one’s own strengths, limitations, and identity while navigating the challenges and opportunities life presents.