In Franz Kafka's diaries from 1910 to 1923, he reflects on the fragility of positive experiences and emotions. He suggests that even the most uplifting moments can vanish unexpectedly, highlighting the fleeting nature of happiness. This creates a sense of vulnerability where cherished feelings may disappear overnight, leaving one in a state of uncertainty.

Kafka's insight into human experience reveals his understanding of the complexities of inner life. The notion that something good can slip away emphasizes the importance of cherishing those moments while they last. His writing invites readers to contemplate their own experiences and the transient nature of joy.