In Orson Scott Card's "Ender's Game," the protagonist, Ender Wiggin, experiences moments of joy amidst his challenging journey. The quote expresses a poignant wish for Ender to fully cherish his happiness, suggesting that such moments may be fleeting and potentially the last he will encounter. It emphasizes the fragility of happiness in the face of difficult circumstances.

The sentiment conveyed highlights the duality of Ender's situation, where joy exists alongside the weight of responsibility and the ominous foreboding of future struggles. It encourages readers to reflect on the importance of treasuring joyful moments, as life can be unpredictable and often daunting. This message serves as a reminder of the need to appreciate happiness while it lasts.