The quote reflects on the innocence and ambition of childhood, suggesting that the dreams and desires of a child, like wanting the moon, are vital for achieving greatness. It indicates that many influential figures began their journeys with such whimsical aspirations, embracing the joy of discovery and the pursuit of their dreams, albeit small, like catching fireflies. This sense of wonder and pursuit is highlighted as a key element in becoming a "great man."

However, the quote also warns of the potential loss of that childlike dreaminess as one matures. It implies that adopting an adult mindset leads to a realization that some dreams are unattainable and ultimately discourages the pursuit of smaller, joyful aspirations. Through this contrast, it urges the importance of retaining a child's spirit and curiosity, suggesting that this mindset is crucial for personal growth and fulfillment.