Franz Kafka suggests that while an observer can never fully understand or access the depths of a person's soul, there is still a connection point where some interaction occurs. This implies that the essence of the soul remains elusive, beyond complete comprehension. It highlights the limitations of perception and the mysteries of individual inner experiences.

Kafka's insight reflects a broader theme about the complexity of human existence and the barriers to truly knowing another. The "margin" mentioned indicates that while we may share feelings or insights, the core of one's being remains private and inaccessible, emphasizing the intricate nature of personal identity and consciousness.