Kafka's love for Czech journalist Milena Jesenská became the most vivid experience in his life. Their romance was short-lived, but their correspondence continued for several years. It was to Milena that the writer gave his diaries and the later famous 'Letter to his Father,' and their complex, emotional relationship was reflected in Kafka's main work, the novel 'The Castle.' These unanswered letters are partly reminiscent of friendly correspondence, filled with anxious thoughts, fears, painful experiences, and deep mutual understanding. They reveal a different Kafka—a romantic in need of support. These letters are another masterpiece, allowing us to better understand Kafka's remarkable personality and talent.