In Haruki Murakami's "Kafka on the Shore," the quote suggests that people's fascination tends to wane with excitement or novelty, while they often remain complacent in the presence of dullness. This reflects a curious contradiction in human nature where the allure of the new and interesting fades quickly, leading to a cycle of searching for stimulation.

The statement emphasizes how humans crave variety and engagement. However, the comfort of the mundane can paradoxically hold their interest for a longer period. It implies that boredom, while often seen as negative, can provide stability, contrasting sharply with the fleeting nature of enthusiasm for the extraordinary.