In P.G. Wodehouse's "Joy in the Morning," the character expresses a profound sense of joy and excitement, comparing his feelings to those of Jeeves, his loyal valet. The metaphor of Jeeves's heart leaping at the sight of a rainbow encapsulates a moment of pure happiness. This imagery emphasizes the beauty of simple pleasures and highlights the character's emotional response to delightful experiences.

The sentiment reveals a theme of appreciation for life's small joys, suggesting that moments of beauty can evoke strong feelings within us. Similar to a rainbow, these moments can be fleeting yet impactful, prompting a sense of wonder and elation that resonates deeply. This interaction reflects the light-hearted spirit of Wodehouse’s writing, where humor and happiness often intertwine in his characters’ adventures.